Science Flashcards

Which type of rock is formed when magma cools and solidifies?

Answer: Igneous

Igneous rocks form when magma (underground) or lava (above ground) cools and solidifies.

A student notices that plants near a window grow toward the light. This response to light is called:

Answer: Phototropism

Phototropism is the growth response of a plant toward or away from a light source.

Which gas do plants absorb from the atmosphere during photosynthesis?

Answer: Carbon dioxide

Plants absorb carbon dioxide (CO₂) from the air and use it along with water and sunlight to produce glucose.

What is the main function of the mitochondria in a cell?

Answer: Generate energy (ATP)

Mitochondria are often called the 'powerhouse of the cell' because they produce ATP through cellular respiration.

Which layer of the Earth is liquid and generates Earth's magnetic field?

Answer: Outer core

The outer core is composed of liquid iron and nickel, and its movement generates Earth's magnetic field.

A force of 20 N acts on an object with a mass of 4 kg. What is the object's acceleration?

Answer: 5 m/s²

Using Newton's second law, acceleration = Force ÷ mass = 20 N ÷ 4 kg = 5 m/s².

Which of the following best describes a physical change?

Answer: Ice melting into water

Ice melting into water is a physical change because only the state of matter changes, not the chemical composition.