SC.8.P.9.2 Chemical Physical Change

SC.7. P.10.1

The water cycle describes how water evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation. Why is the energy from the sun an important part of the water cycle?

• It provides energy so that the water vapor in the air can condense.

• It provides the energy needed for water to evaporate.

• It melts the polar ice caps providing more drinking water

• The sun does not have an effect on the water cycle

SC.7. P.10.1

   Electromagnetic waves travel at the speed of light in a vacuum. Which is true about the forms of energy found in the electromagnetic spectrum?

• They all travel in waves.

• They all travel slower than light

• They all may be created or destroyed.

• They all travel in groups or clusters.

SC.8. P.9.2

Derek left the ice cream out on the counter. He noticed that the ice cream began to melt when it was left out at room temperature. What process is Derek observing?

• a physical change

• a chemical change

• a chemical reaction

• the formation of a new substance.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

SC.8. L.18.4

During photosynthesis, the proteins inside chloroplasts in plant cells absorb energy from the Sun. Which statement best describes how photosynthesis follows the law of conservation of energy?

• Electrical energy from the Sun is converted into light energy in plant cells.

• Light energy from the Sun is converted into chemical energy in plant cells.

• Nuclear energy from the Sun is converted into kinetic energy in plant cells.

• Chemical energy from the Sun is converted into thermal energy in plant cells.

SC.8. L.18.4

A group of athletes will be running a marathon this afternoon. They each eat a large breakfast to ensure they will reach the finish line, since the food provides the energy his cells need to complete any activity. Which form of energy is stored in food?

• Chemical energy

• Kinetic energy

• Light energy

• Mechanical energy

SC.8. P.9.2

Chemical changes are accompanied by signs that show that a chemical reaction has occurred.  By making careful observations about the chemical reaction, a student can see one or more of these signs.  The signs will provide evidence that the event is not a physical change.  Which of the following is NOT likely to be evidence of a chemical change?

• A form of matter changes state from solid to liquid.

• A substance forms that releases heat and light.

• Carbon dioxide, water, and ash are produced.

• There are signs of rusting on a metal object.

Tags

NGSS.MS-PS1-2

SC.8. P.9.2

In a physical or chemical reaction, the total amount of the products must be equal to the total amount of the starting materials. Which of the following laws is defined by this statement?

• The Law of Universal Gravitation

• The Law of Chemical Properties

• The Law of Conservation of Energy

• The Law of Conservation of Mass

Tags

NGSS.MS-PS1-5

SC.8. P.9.2

George painted a picture on a canvas, and he mixed some colors together because he wanted to make a particular shade of blue. Mixing paint is an example of what kind of process?

• Chemical change

• Physical change

• Forming a compound

• Dissolving one substance into another

SC.8. P.9.2

Your family is driving to Florida for spring break. As you are moving, the car burns gasoline in the engine. How is energy being transferred in the car’s engine?

• Electrical energy into thermal energy

• Mechanical energy into kinetic energy

• Chemical energy into mechanical energy

• Kinetic energy into potential energy

Tags

NGSS.MS-PS3-5

SC.8. P.9.2

Matter can go through two types of changes: physical changes and chemical changes. Chemical changes result in new substances, while physical changes do not. Which process is an example of a physical change?

• paper burning into ash

• dough being baked into bread

• apple juice turning into vinegar

• rock being crushed into gravel