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True/False Light and Sound
EduBook Organización
- 2883 visitas
Answer true or false: Sunlight comes instantly to Earth. All objects emit their own light. The speed of light is faster than the speed of sound. Sound can be spread by a vacuum.
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The Earth's climates
EduBook Organización
- 1 lo usan
- 9397 visitas
1.1. The Earth's climate zones There are three climate zones on Earth: The hot zone This area is between the Tropic of Cancer and the Tropic of Capricorn. It receives the most direct sunlight…
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The natural environment. Ecosystems
EduBook Organización
- 6149 visitas
Most of the energy used by living things originally comes from sunlight which is trapped by autotrophs (or producers). This energy is then transferred from the producers to all other living things…
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The leaves make the food
EduBook Organización
- 3905 visitas
The roots absorb water and minerals from the soil. This becomes raw sap. The raw sap moves up the stem to the leaves. The leaves use raw sap, sunlight and a gas called carbon dioxide to make food. The…
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Before you start - The natural environment. Ecosystems
EduBook Organización
- 3655 visitas
Most of the energy used by living things originally comes from sunlight which is trapped by autotrophs (or producers). This energy is then transferred from the producers to all other living things…
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Remember - The natural environment. Ecosystems
EduBook Organización
- 3531 visitas
Most of the energy used by living things originally comes from sunlight which is trapped by autotrophs (or producers). This energy is then transferred from the producers to all other living things…
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Introduction - The natural environment. Ecosystems
EduBook Organización
- 3448 visitas
Most of the energy used by living things originally comes from sunlight which is trapped by autotrophs (or producers). This energy is then transferred from the producers to all other living things…
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Calculate. The speed of light
EduBook Organización
- 3348 visitas
Calculate the distance in km that light travels in 20 s. d = km Calculate the distance in km that light travels in methacrylate in 20 s d = km If sunlight takes 8 minutes to reach Earth through the…
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Investigate - The natural environment. Ecosystems
EduBook Organización
- 3322 visitas
Most of the energy used by living things originally comes from sunlight which is trapped by autotrophs (or producers). This energy is then transferred from the producers to all other living things…
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