FA3 Revision

What is the unit of measurement for forces?

• Joules

• Newtons

• Watts

• Pascals

Which of the following best describes a producer in a food chain?

• An animal that eats only plants

• An organism that makes its own food using sunlight

• An animal that eats both plants and animals

• An animal that eats dead animals

What is the main function of a food chain?

• To show how animals migrate

• To transfer energy from one species to another

• To describe animal habitats

• To explain plant growth

Which of the following is a correct sequence in a food chain?

• Grass → Grasshopper → Frog → Python → Eagle

• Grass → Frog → Grasshopper → Eagle → Python

• Eagle → Python → Frog → Grasshopper → Grass

• Grasshopper → Grass → Frog → Eagle → Python

Which test would you use to check for the presence of starch in a food sample?

• Biuret solution

• Iodine solution

• Benedict’s solution

• Ethanol solution

What color indicates a positive result for protein in a food test?

• Dark blue-black

• Orange-red

• Purple

• Cloudy white

If a food sample turns cloudy white after adding ethanol and water, what does it contain?

• Starch

• Protein

• Lipids

• Sugar

Which of the following statements is true about humans in the food chain?

• Humans are always producers.

• Humans eat only plants.

• Humans are at the end of the food chain.

• Humans are always scavengers.

A student wants to test for sugar in a food sample. Which procedure should they follow?

• Add iodine solution and look for a dark blue-black color.

• Add biuret solution and look for a purple color.

• Add Benedict’s solution, warm the test tube, and look for an orange-red color.

• Add ethanol and water and look for a cloudy white color.

Which type of consumer eats both plants and animals?

• Herbivore

• Carnivore

• Omnivore

• Scavenger