Pure substances are
A. alloys and can be represented by one chemical symbol.
B. elements and can be represented by one chemical symbol.
C. mixtures and can be represented by two or more chemical symbols.
D. solutions and can be represented by two or more chemical symbols.
Answer:
a
Explanation:
Suppose a dam was built that prevented melted snow from reaching streams and rivers below a series of mountains. How may this affect the water cycle?
Answer:
The water may not fall for a while because the water that dosen't go down the stream won't be able to evaporate. So rain clouds won't form in that area.
Explanation:
I hope I helped.
PLEASE HELP MEEE I WILL MARK BRAINLIST FOR THIS ITS SUPER SIMPLE....BUT U MUST TYPE EVERYTHING needed ASAP
all I need you to do its to type out these pictures word for word it pretty simple
Other Causes of Extinction
In addition to habitat destruction, other human-caused problems are also threatening many species. These include issues associated with climate change, pollution, and over-population.
Climax Community
A climax community is the end result of ecological succession. The climax community is a stable balance of all organisms in an ecosystem, and will remain stable unless a disaster strikes.
Invasive Species
As we have learned earlier in the unit, invasive or non-native species can also change an ecosystem.
When invasive species enter an ecosystem they change that ecosystem's dynamic and cause a disruption to the flow.
Habitat Destruction
Your habitat can be altered, and you can easily adapt. Most people live in a few different places and go to a number of different schools throughout their life. But a plant or animal may not be able to adapt to a changed habitat.
Humans often destroy the habitats of other organisms. Habitat destruction can cause the extinction of species.
Extinction is the complete disappearance of a species. Once a species is extinct, it can never recover.
Human Activity
It's important to note that human activity has the greatest impact on the amount and quality of wildlife habitat in many areas of the world. Wildlife habitat can be destroyed or its quality diminished as a result of urban growth, agricultural practices, pollution, or habitat destruction.
People can also have a positive impact on wildlife populations through improvement and protection of habitat or ecosystems. Planting trees and shrubs and providing sources of food and water in individual yards is one way people can help wildlife.
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Plz help ill give brainlist‼️‼️How do molecules become substances???
Answer:
When two or more molecules/atoms join together to create chemical bonds
Explanation:
I learned Physics :)
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Which statement is true about the elements in the periodic table?
1.Elements in family 2 are all nonmetals.
2.Elements in period 4 are all metals.
3.Elements in period 6 have similar properties.
4.Elements in family 7 have similar properties.
Answer:
Option 4 is the right of ur question
4.Elements in family 7 have similar properties.
no link just right answer
Answer:
I think it is C since the trees hold the habitats of the animals and provide cover so with less animals there is less diversity.
QUESTION 1
Which term describes the interaction between two animals when one feeds on the other?
A.competition
B.community
C.predator/prey
D.an ecosystem
compare the properties of the moon to those of earth
Draw a labeled sketch of an electric motor to show how it uses electromagnetism to convert electrical energy to kinetic energy.
Assume that an electromagnet and a solenoid have the same number of turns in their wire coil and the same amount of current flowing through the wire. Which device has the stronger magnetic field? Explain your answer.
Answer:
oh lawd i dont know hun
Explanation:
Please Help me on this question
ASAP LIKE RIGHT NOW
What is the frequency of a wave?
Answer:
The number of waves that pass a fixed point in a given amount of time
Explanation:
Help please ASAP just with number 11
Answer:
*A frogs response to prey is (innate)* meaning an inborn and natural phenomenon due to their instinct.
what they are saying when they say how time could change that. This could be a number of things, aging, humans feeding them, and running out of their own food from another species being introduced to their home.
Explanation:
:)
Can anyone help me with this since it is a quiz and I am really bad at chemistry!!
Answer:
Down below <3
Explanation:
1. 1 [tex]N_{2}[/tex] + 3 [tex]H_{2}[/tex] ---> 2 [tex]NH_{3}[/tex]
2. 2 [tex]KClO_{3}[/tex] ---> 2 KCl + 3 [tex]O_{2}[/tex]
3. 1 [tex]Na_{3}PO_{4}[/tex] + 3 HCl ---> _ 3_ NaCl + 1 [tex]H_{3}PO_{4}[/tex]
4. 1 [tex]C_{2}H_{6}O[/tex] + 3 [tex]O_{2}[/tex] ---> 2 [tex]CO_{2}[/tex] + 3 [tex]H_{2}O[/tex]
Select the statement below that best describes how environmental conditions affect an individual’s likelihood of survival and reproduction.
Explain why you chose the answer you did to the question above.
Describe how sound waves travel through a solid, liquid, and gas. Why does it move differently through these different mediums?
Answer:
Sound travels more quickly through solids than through liquids and gases because the molecules of a solid are closer together and, therefore, can transmit the vibrations (energy) faster. Sound travels most slowly through gases because the molecules of a gas are farthest apart.
hope this helps.
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Answer:
umm sorry but some times do it your self
Explanation:
Answer:
its too much and the people that say download here and put bit . ly blah blah are fake.
Explanation:
20 points I will give you brainliest if you answer in 5 mins
How is an image formed by a plane mirror?
A) Light bounces off of the mirror and then appears to come from in front of the mirror.
B) Light passes through the mirror and then appears to come from behind the mirror.
C) Light passes through the mirror and then appears to come from in front of the mirror.
D) Light bounces off of the mirror and then appears to come from behind the mirror.
Answer:Light bounces off of the mirror and then appears to come from behind the mirror.
Explanation:Plane mirrors form images that are virtual, upright and the same size and shape as the object it is reflecting.
When rays of light from the object hits a plane mirror they bounces off the mirror,that is they undergo reflection, and appear to originate from behind the mirror, resulting to the formation of a virtual image.
The image formed appears to be behind the plane in which the mirror lies. A virtual image is an image that is formed at a location from which the rays of light appear to come from. The image can not be formed on a screen..
I NEED THIS ASAP
Describe or define transform plate boundary
Alfred Wegener proposed the theory of continental drift around 1912. Which of these components of his theory is now known to be FALSE?
Select one:
a. Similar plants and animals live on continents separated by oceans.
b. All existing continents were once joined into a supercontinent.
c. The boundaries of many neighboring continents fit together.
d. The Moon’s gravity and Earth’s spin can move the continents.
The component of Alfred Wegener's theory that is known to be false is as follows:
The Moon’s gravity and Earth’s spin can move the continents.Thus, the correct option for this question is D.
What is continental drift?Continental drift may be defined as the process of the gradual movement of continents as the result of the motion of tectonic plates. It is a type of hypothesis that illustrates that the Earth's continents have migrated over geologic time with respect to each other.
This theory by Alfred Wegener demonstrates that similar kinds of plants and animals live on continents separated by oceans. According to him, all existing continents were once joined into a supercontinent known as Pangea. The boundaries of many neighboring continents fit together due to the gradual splitting of Pangea.
Therefore, the Moon’s gravity and Earth’s spin can move the continents is the component of Alfred Wegener's theory that is known to be false. Thus, the correct option for this question is D.
To learn more about Continental drift, refer to the link:
https://brainly.com/question/7350119
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What's wrong with Danny? Danny is 13 years old and loves to ride dirt bikes. On Saturdays Danny would meet with his friends at Tony's pizza shop before they went to the track. One day Danny noticed that every time he ate he started feeling sick. His stomach starts to hurt and he had diarrhea. Plus, he was always tired. Danny's mom took him to the doctor to see what was wrong. Doctor Lawson conducted multiple test and realized that Danny's digestive system wasn't functioning properly. He was not producing enough digestive enzymes. What could be wrong with Danny? What medical condition does Danny have?
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A solution of sodium iodide is added to a solution of potassium nitrate to make a potassium iodide precipitate and a sodium nitrate solution?
Key Words
KNO3
NaNO3
KI
NaI
Answer:
NaNO3
Explanation:
Sorry If its incorrect
The addition of a solution of sodium iodide and potassium nitrate has been the displacement reaction.
The reaction has resulted in the formation of the precipitate of Potassium iodide and Sodium nitrate.
The chemical equation for the reaction can be:
[tex]\rm NaI\;+\;KNO_3\;\rightarrow\;NaNO_3\;+\;KI[/tex]
The reaction has been an exothermic reaction with the formation of the pale yellow precipitate of the potassium iodide.
For more information about potassium nitrate, refer to the link:
https://brainly.com/question/16823927
WILL MARK BRAINLIST FOR BEST ANSWER!!!
What things can cause extinction of a species?
Answer:
Demographic and genetic phenomenon
destruction of habitat
introduction of invasive species
climate change
hunting and illegal trafficking
How does the ocean currents change the air temperature?
NOT TAKING ANSWERS FROM G00GLE
Answer:
sending heat toward the polar regions
Explanation:
Okay, okay. Serious time. What is the difference between electric and mechanical energy? Name 2 examples for each, and give one situation for each.
Answer:
Kinetic Energy can be defined as the energy possessed by the object by the virtue of its motion. The sum of these two energies is often called Mechanical Energy of the System. ... Electric Energy is also a form of these 2 energies: Electric potential energy stored in a charged particle in an electric field.
Explanation:
sorry if im wrong T-T
A solution that contains more OHions than H30+ ions, is called a(n)... O A. base O B. acid O C. neutral solution O D. isosolution
Answer:
a
Explanation:
Which medical condition(s) can prevent molecules from entering the cell?
Answer:
Explanation:
any type of spreading disease that kills
Answer:
The cell membrane's main trait is its selective permeability, which means that it allows some substances to cross it easily, but not others. Small molecules that are nonpolar (have no charge) can cross the membrane easily through diffusion, but ions (charged molecules) and larger molecules typically cannot.
Explanation:
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A wellington has higher tempatured and more precipitation
B Wellington has higher tempatures and less precipatation
C Wellington has lower tempatures and less precipatation than nairobi
D Wellington has lower tempatures and more precipatation than Nairobi
Based on their climate zones, which statement best compares the climates of Wellington and Nairobi?
Which medical condition(s) can prevent molecules from entering the cell?
Answer:
cell membrane disease
Explanation: