FREE GMAS Science Questions and Answers
What is the primary source of energy for life on Earth?
Correct!
Wrong!
The Sun provides energy for plants through photosynthesis, which forms the base of the food chain and supports nearly all life on Earth.
Which of the following is an example of a chemical change?
Correct!
Wrong!
A nail rusting is a chemical change because it forms a new substance (iron oxide). Melting, boiling, and breaking are physical changes, as they do not change the substance's chemical structure.
What do plants release into the atmosphere during photosynthesis?
Correct!
Wrong!
During photosynthesis, plants take in carbon dioxide and water and, using sunlight, produce glucose and oxygen, which is released into the atmosphere.
Which layer of Earth is made up of solid rock and forms the continents and ocean floors?
Correct!
Wrong!
The crust is the outermost layer of Earth, composed of solid rock, and includes both continental and oceanic regions.
What is the main function of the roots in a plant?
Correct!
Wrong!
Roots anchor the plant in the ground and absorb water and nutrients from the soil, which are vital for the plant’s growth and survival.