Which term describes a relationship between two living things where one organism benefits and the other is harmed?

Which of the following is an example of interaction between a living thing and a non-living thing?

A clownfish lives among the tentacles of a sea anemone. The anemone protects the clownfish from predators, while the clownfish helps clean the anemone and drives away its predators. This is an example of:

4. Which situation shows a HARMFUL interaction between living and non-living things?

A farmer plants marigold flowers around his vegetable garden because marigolds repel harmful insects that damage the vegetables. What kind of interaction is shown, and what effect does it have on the vegetables?

Which action should a community do to lessen the harmful effect of water pollution on fish living in a river?

Which simple machine consists of a rope and a grooved wheel used to lift objects?

Which simple machine is used in a seesaw at the playground?

A ramp used to move a wheelchair into a building is an example of what simple machine?

Which of these tools uses a wedge to work?

Which simple machine would be MOST useful for lifting a heavy bucket of water out of a deep well?

A construction worker needs to move heavy boxes from the ground to the back of a truck without lifting them directly. Which simple machine should he use?

Which simple machine would you recommend a school canteen install to make it easier for workers to move heavy sacks of rice up a small flight of stairs, and why?

What is one advantage of using a lever to lift heavy objects?

What is a limitation (disadvantage) of using an inclined plane?

Which of the following is a disadvantage of using a wedge?

Which statement correctly describes an advantage of using a pulley system with multiple wheels?

During a class investigation, Group A used a single fixed pulley to lift a bag of books, while Group B used a system of two pulleys to lift the same bag. Which group most likely used LESS force to lift the bag, and why?

A student is comparing an inclined plane and direct lifting to move a heavy box onto a truck. Which conclusion is best supported by the investigation?

A group of students tested different lever setups and found that placing the fulcrum closer to the load required less effort to lift it. Based on this investigation, which setup would require the LEAST effort to lift a heavy rock?