Science

Explain the difference between a virus and a bacteria.

• Viruses and bacteria are both multicellular organisms.

• Viruses are smaller and need a host cell to reproduce, while bacteria are single-celled organisms that can survive on their own.

• Bacteria are smaller and need a host cell to reproduce, while viruses are single-celled organisms that can survive on their own.

• Viruses are larger and can survive on their own, while bacteria are smaller and need a host cell to reproduce.

What are some ways to prevent the spread of communicable diseases?

• Ignoring symptoms, not staying home when sick, not practicing social distancing

• Washing hands frequently, covering mouth and nose when sneezing or coughing, staying home when sick, getting vaccinated, practicing good hygiene

• Eating raw meat, not washing hands, not covering mouth when sneezing or coughing

• Sharing drinks and utensils, not getting vaccinated, not practicing good hygiene

What is the difference between an epidemic and a pandemic?

• An epidemic is a disease that affects a large number of people within a community, population, or region while a pandemic is an epidemic that has spread over multiple countries or continents.

• An epidemic is a disease that affects a small number of people within a community, population, or region while a pandemic is an epidemic that has spread over a single country.

• An epidemic is a disease that affects a large number of people within a community, population, or region while a pandemic is a disease that affects a small number of people within a community, population, or region.

• There is no difference between an epidemic and a pandemic.

A student was asked to measure out 50ml of sodium chloride solution. Which piece of apparatus would be the best to use for this task?

• 250ml beaker

• 100ml measuring cylinder

• 20ml syringe

• 10ml measuring cylinder

State the volume of liquid present in the burette.

• 21.1

• 21.2

• 20.8

• 20.9

Which of the following is not a measurement of volume?

• cm

• cm³

• ml

• l

At which position (letter) do you read the volume present in the measuring cylinder?

• A

• B

• C

State the volume of the liquid present in the measuring cylinder.

• 45

• 40.3

• 43

• 70

A student was asked to measure out 2ml of sulfuric acid. Which piece of apparatus would be the best to use for this task?

• 100ml beaker

• 50ml measuring cylinder

• 5ml syringe

• 25ml measuring cylinder

State the volume of liquid present in the measuring cylinder.

• 20.8

• 28

• 36

• 32