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Science
7th
grade
Energy Transformations, Physical/Chemical Change, Body Systems
10 questions
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- 1. Multiple Choice
In a change where a new substance is made and the change is difficult to reverse, that change is:
physical
chemical
radiant
potential
- 2. Multiple Choice
When you observe a physical change, the substance
changes its chemical composition.
gives off heat.
does not change in composition.
changes in color.
- 3. Multiple Choice
Which of the following is NOT a physical change?
Freezing water to make ice cubes
Melting gold to make jewelry
Burning gasoline in a lawnmower
Boiling water for soup
- 4. Multiple Choice
You make yourself a piece of toast before leaving for school in the morning. What energy transformations are involved in making a piece of toast?
Chemical to heat and kinetic
Chemical to electrical
Electrical to chemical
Electrical to heat and light
- 5. Multiple Choice
Which energy conversion is taking place in this picture?
Chemical to light
Chemical to heat
Heat to chemical
Light to chemical
- 6. Multiple Choice
What always happens when an energy transformation occurs?
The total amount of energy remains the same.
The amount of energy available gets entirely used up.
The energy level can increase depending on the situation.
Energy stays the same, and is never transformed.
- 7. Multiple Choice
A bird that eats seeds converts the energy stored in the seeds into the energy of its flight muscles. This conversion is from what kind of energy to what other kind of energy?
Potential to kinetic
Kinetic to thermal
Chemical to kinetic
Chemical to thermal
- 8. Multiple Choice
Which body system controls and coordinates the body by sending electrical messages?
Endocrine
Excretory
Nervous
Digestive
- 9. Multiple Choice
Which one of the body systems is responsible for transporting nutrients, oxygen, and wastes throughout the body?
Respiratory
Circulatory
Digestive
Excretory
- 10. Multiple Choice
Which body system is depicted in the picture?
Endocrine
Reproductive
Digestive
Excretory
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