OSE 7.5 Test - Lessons 1- 10

What happens to living things in an ecosystem when there are more or fewer resources?

• It doesn’t matter; animals just change quickly.
• It affects how many animals there are and how healthy they are.
• It changes what color the animals are.
• It makes animals move to cities.

If forests are cut down and replaced with palm tree farms, which animals might grow in number?

• Orangutans
• Tigers
• Rats
• None of these

How can changes in things like sunlight, water, or temperature affect animals and plants?

• They don’t really matter much.
• They always bring in more different kinds of life.
• They can make populations grow or shrink.
• They make ecosystems stronger.

What helps keep many different kinds of life in an ecosystem?

• Having more people
• Having fewer types of animals and plants
• Helping just one kind of plant or animal
• Finding and using ways to protect nature

How do people affect nature?

• They can change or even destroy natural places.
• People don’t really affect nature.
• People only help the environment.
• Nature always gets better because of people.

What is one way to reduce harm from palm oil farming in rainforests?

• Expanding oil palm plantations
• Clearing more land for agriculture
• Increasing the use of pesticides
• Developing sustainable farming practices

What is a challenge for farmers who want to switch to better, eco-friendly farming?

• They need to ensure their families can still be supported.
• Sustainable practices are less efficient.
• They fear attracting more wildlife.
• There is too much land available for farming.

Why does palm oil farming hurt rainforests?

• It doesn’t hurt rainforests at all.
• Palm trees only grow in cities.
• Palm trees grow best in the same places rainforests do, so forests get cut down.
• Palm trees grow well in dry deserts.

Why do rats, pigs, and snakes often grow in number when palm farms replace rainforests?

• They like eating palm fruits.
• They do well in the new environment without predators.
• Farmers raise them to sell.
• It gets cooler, which they like.

What happens when there are not enough resources for animals and plants?

• It doesn’t change anything.
• Too many resources make populations smaller.
• Not enough resources can make populations smaller.
• Only predators decide population sizes.