Science Flashcards

Which layer of Earth is made of molten rock and is located directly beneath the crust?

Answer: Mantle

The mantle is the thick layer of partially molten rock beneath Earth's crust, and its movement drives plate tectonics.

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

Answer: Phototropism

Phototropism is the growth response of a plant toward a light source, controlled by the hormone auxin.

Sound travels fastest through which medium?

Answer: Steel

Sound travels fastest through solids like steel because the particles are closely packed, allowing vibrations to transfer more quickly.

Which process do green plants use to convert sunlight into food?

Answer: Photosynthesis

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to produce glucose and oxygen.

If a scientist repeats an experiment five times and gets similar results each time, this supports which conclusion?

Answer: The results are reliable

Consistent results across multiple trials indicate that the experiment's findings are reliable and reproducible.

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

Answer: Igneous

Igneous rocks form when magma (underground) or lava (at the surface) cools and solidifies.

An astronaut weighs less on the Moon than on Earth. This is because the Moon has:

Answer: Weaker gravity

The Moon's gravity is about one-sixth that of Earth's because the Moon has less mass, resulting in a lower gravitational pull.