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Eight Class Exam

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1. What is the primary source of energy for Earth's climate system?

Wind

Geothermal energy

The Sun

Ocean currents

2. Which part of the cell is responsible for controlling what enters and exits?

Nucleus

Mitochondria

Cell membrane

Ribosome

3. What type of chemical reaction absorbs energy from the surroundings?

Exothermic

Endothermic

Combustion

Neutralization

4. What is the chemical symbol for sodium?

Na

S

Sn

Si

5. Which law states that energy cannot be created or destroyed?

Law of Conservation of Mass

Law of Conservation of Energy

Newton’s First Law

Boyle’s Law

6. What is the main function of the digestive system?

Transport nutrients

Break down food

Store energy

Protect against infections

7. What is the powerhouse of the cell known for generating ATP?

Nucleus

Mitochondria

Ribosome

Endoplasmic Reticulum

8. What is the chemical formula for table salt?

KCl

NaCl

MgCl2

CaCl2

9. Which of these is a renewable energy source?

Coal

Natural gas

Solar energy

Oil

10. What is the main gas responsible for the greenhouse effect?

Oxygen

Nitrogen

Carbon Dioxide

Hydrogen

11. Which part of the human brain is responsible for coordination and balance?

Cerebrum

Cerebellum

Medulla

Thalamus

12. What is the process by which plants lose water vapor through their leaves?

Photosynthesis

Transpiration

Respiration

Germination

13. What is the primary pigment responsible for photosynthesis?

Carotene

Chlorophyll

Anthocyanin

Xanthophyll

14. What is the formula for calculating speed?

Speed = Distance × Time

Speed = Distance / Time

Speed = Time / Distance

Speed = Distance + Time

15. What is the process of water changing from liquid to gas called?

Condensation

Evaporation

Freezing

Melting

16. What type of energy transformation occurs in a battery-powered flashlight?

Chemical to electrical to light

Electrical to chemical to light

Mechanical to light to thermal

Light to electrical to chemical

17. What is the function of hemoglobin in the blood?

Transport nutrients

Carry oxygen

Fight infections

Clot blood

18. Which of these diseases is caused by a virus?

Tuberculosis

Malaria

Influenza

Diabetes

19.What type of energy is stored in food?

Kinetic

Chemical

Thermal

Nuclear

20. What is the effect of increasing the temperature on the solubility of solids in liquids?

Decreases

Increases

Stays the same

Reverses

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