Living things need sunlight. Without light plants, animals, and humans would not be able to survive. Young readers will discover the ways that different living things use sunlight.

Can there be life without light?

It flows as radiation from the surface into space, warms our planet and sets in motion many chemical and physical processes. Without sunlight, it would be bleak on earth. There wouldn’t be any plants, animals and people. There would be no other form of life.

Do all living things require light?

So not every organism needs the energy of the sun for food, but all living things need the heat of the sun to survive.

What living things need light?

Animals: Sunlight is vital for all animals, even though different animals need different amounts of sunlight and in different ways. For example, many mammals and reptiles such as snakes, turtles, and lizards come out during the day to bask in the sun to raise their body temperatures and become active.

Do all living things respond to light?

All living things are able to respond to stimuli in the external environment. For example, living things respond to changes in light, heat, sound, and chemical and mechanical contact. To detect stimuli, organisms have means for receiving information, such as eyes, ears, and taste buds.

Why do we need light?

Answer: Light is the main source of energy for all living organisms. Explanation: Plants, main sustainers of life, are crucial in this conversion process and need light for photosynthesis that enables them to make their own food and food for others.

What will happen if we don’t have light?

Without the Sun’s rays, all photosynthesis on Earth would stop. All plants would die and, eventually, all animals that rely on plants for food — including humans — would die, too.

What do all living things need?

Most living things need food, water, light, temperatures within certain limits, and air. Living things have a variety of characteristics that are displayed to different degrees: they respire, move, respond to stimuli, reproduce and grow, and are dependent on their environment.

Why do animals need light?

Vitamin D provides calcium, which helps form strong bones and teeth. Animals get vitamin D directly by exposure to the Sun or indirectly by eating plants. Finally, sunlight has been found to induce reproduction in some animals, such as birds.

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