What is the primary role of leaves on a plant?
To make food through photosynthesis
To absorb water from the soil
To protect the roots
To store energy for winter
Which of the following is a gas in the air we breathe?
Oxygen
Water
Iron
Carbon
What do scientists use to measure temperature?
Hydrometer
Thermometer
Speedometer
Barometer
What is the main source of energy for Earth?
Wind energy
The Earth itself
The Sun
The Moon