In which layer does convection occur?

• a. Core

• b. Mantle

• c. Crust

• d. Ozone

Which is true about the second tropic level in a food chain or web?

• a. It has the most available energy and includes all consumers

• b. It has the most available energy and includes all producers

• c. It includes primary consumers(heterotrophs), which are known as herbivores

• d. It includes primary consumers (autotrophs), which are known as herbivores

During a storm when you see lightning several seconds usually pass before you hear thunder. What is the reason for this?

• a. Your eyes must work better than your ears

• b. Only the sound waves transmit energy

• c. Only the light waves transmit energy

• d. Light waves travel faster than sound waves

Which is true based on diffraction of sound?

• a. Sound can only travel in straight paths

• b. Sound does not travel quickly

• c.Sound can be heard in other rooms

• d. None of these

Which is the best example of an abiotic factor in an ecosystem.

• a. Climate

• b. Trees

• c. Predators

• d. Prey

What three materials are needed in order for photosynthesis to occur?

• a. Sunlight, water, and carbon dioxide

• b. Sunlight, water, and oxygen

• c. Sunlight, oxygen, and carbon dioxide

• d. Carbon dioxide, water, and ATP

Which best describes a mechanical transfer of energy?

• a. Moving objects pushing or pulling on another

• b. Transfer of warmer energy to cooler energy

• c. Transfer of electric charges through conductors

• d. Waves transferring energy

A circut is used to transfer what type of energy?

• a. Mechanical

• b. Thermal

• c. Electrical

• d. Electromagnetic

The wires that are part of electrical appliances are usually made of a metal interior surrounded by a plastic or rubber coating. What is the purpose of the coating?

• a. To allow convection of electrical energy

• b. To conduct the electrical energy

• c. To transfer the electrical energy

• d. To insulate the electrical energy

A shadow forms from perfect alignment of the moon between the Sun and the Earth. What is most likely occurring?

• a. A lunar eclipse

• b. A solar eclipse

• c. A season

• d. an orbit