Grade 5: Continuation Quiz 1 Science

TRUE or FALSE: Communication is more effective when the description

is clear, detailed, and uses both qualitative and quantitative observations.

• True

• False

TRUE or FALSE: Drawing and illustrations cannot help in describing observations.

• True

• False

Answer explanation

Drawing and illustrations CAN help in describing observations. Scientists, meteorologists benefit from these. See example here.

What are tools used to represent ideas and show the relationship between them?

• table

• concept map

• graphic organizers

• flowchart

Hannah wants to show the process of planting mungo seeds. What should she use?

• concept map

• table

• graphic organiser

• flowchart

Answer explanation

A flowchart is a visual representation of a sequence of processes.

Which of the following is not true about hypothesis?

• Educated guess about how things work

• Tentative explanation for observations

• Based on facts and scientific theories

• Usually uses the format, "f (what you do), then (what wil happen)."

Grace wants to find out which type of soil is best for growing bean plants. She decides to test three different types of soil: sandy soil, clay soil, and loamy soil. Grace plants the same type of bean seed in each type of soil and gives all the plants the same amount of water and sunlight every day. After two weeks, Grace measures the height of the plants to see how well they grew.

In this situation, what is the independent variable?

• Amount of water

• Type of soil

• Amount of sunlight

• Type of seed

Answer explanation

The independent variable is the variable that is changed. This is are we expect will influence dependent variables.

Grace wants to find out which type of soil is best for growing bean plants. She decides to test three different types of soil: sandy soil, clay soil, and loamy soil. Grace plants the same type of bean seed in each type of soil and gives all the plants the same amount of water and sunlight every day. After two weeks, Grace measures the height of the plants to see how well they grew.

In this situation, what is the dependent variable?

• The height of the plant

• Type of seed

• Amount of sunlight

• Type of soil

Answer explanation

The dependent variable is what the student measures to see the effect of the change (the height of the plants).

Grace wants to find out which type of soil is best for growing bean plants. She decides to test three different types of soil: sandy soil, clay soil, and loamy soil. Grace plants the same type of bean seed in each type of soil and gives all the plants the same amount of water and sunlight every day. After two weeks, Grace measures the height of the plants to see how well they grew.

In this situation, which of the following choices below is not a controlled variable?

• Amount of water

• Type of seed

• Amount of sunlight

• Type of soil

Answer explanation

The controlled variables are all the other factors that the student keeps the same to ensure that the results are due to the independent variable and not something else.

Tim wants to determine which liquid causes the most rust to form on iron nails. He places an iron nail in five different liquids, 100mL each liquid: water, saltwater, vinegar, soda, and oil. Tim leaves the nails in the liquids for one week and then measures the amount of rust that forms on each nail.

In this situation, which of the following choices below is not a controlled variable?

• Amount of liquid

• Length of exposure to liquid

• Type of iron nail

• Type of liquid

Answer explanation

The controlled variables are all the other factors kept constant, such as the type of nail, the amount of liquid, and the duration of exposure, to ensure the results are only affected by the type of liquid.

Tim wants to determine which liquid causes the most rust to form on iron nails. He places an iron nail in five different liquids, 100mL each liquid: water, saltwater, vinegar, soda, and oil. Tim leaves the nails in the liquids for one week and then measures the amount of rust that forms on each nail.

In this situation, which is the dependent variable?

• Amount of liquid

• Amount of rust on each nail after one week

• Type of iron nail

• Length of exposure to liquid

Answer explanation

The dependent variable is the amount of rust formed on the nail, which Tim measures after a week.