7th Grade Science Exam

What is thermal energy?

• The energy of light waves.

• The energy of moving particles.

• The energy of sound.

• The energy of electricity.

Which type of heat transfer happens through direct contact?

• Conduction

• Convection

• Radiation

• Reflection

What is the main function of the respiratory system?

• To digest food.

• To help us breathe.

• To pump blood.

• To filter water.

Where does gas exchange happen in the lungs?

• Trachea

• Bronchi

• Alveoli

• Diaphragm

Which respiratory disease causes airways to swell and narrow?

• Asthma

• Bronchitis

• Pneumonia

• COVID-19

What is a common symptom of pneumonia?

• Fever

• Stomach pain

• Headache

• Rash

What is an energy transformation?

• Energy being created.

• Energy changing from one form to another.

• Energy being destroyed.

• Energy staying the same.

Which energy transformation happens in a flashlight?

• Chemical → Electrical → Light

• Light → Electrical → Chemical

• Thermal → Mechanical → Electrical

• Mechanical → Thermal → Light

What is the law of conservation of energy?

• Energy can be created but not destroyed.

• Energy can be destroyed but not created.

• Energy cannot be created or destroyed.

• Energy is always increasing.

Which of the following is a renewable energy source?

• Coal

• Oil

• Solar

• Natural gas