Which statement is true about a triple beam balance and spring scale?(1 point)

Question

Responses

A triple beam balance is used to measure the mass of an object, and a spring scale is used to measure the weight of an object.
A triple beam balance is used to measure the mass of an object, and a spring scale is used to measure the weight of an object.

Both a triple beam balance and a spring scale are used to measure the weight of an object.
Both a triple beam balance and a spring scale are used to measure the weight of an object.

A triple beam balance is used to measure the weight of an object, and a spring scale is used to measure the mass of an object.
A triple beam balance is used to measure the weight of an object, and a spring scale is used to measure the mass of an object.

Both a triple beam balance and a spring scale are used to measure the mass of an object.

Answer 1

The true statement is:

A triple beam balance is used to measure the mass of an object, and a spring scale is used to measure the weight of an object.

The triple beam balance measures mass (typically in grams), while the spring scale measures weight (the force of gravity acting on an object) which is typically measured in newtons or pounds.

Answer 2

Why is agar medium used in Petri dishes?(1 point)
Responses

It sterilizes the petri dish.
It sterilizes the petri dish.

It makes bacteria appear larger.
It makes bacteria appear larger.

It makes cells glow.
It makes cells glow.

It helps microorganisms grow.

Answer 3

The correct response is:

It helps microorganisms grow.

Agar medium provides a solid surface for microorganisms to grow on and supplies nutrients needed for their growth.

Answer 4

Which statement accurately describes test tubes and beakers?(1 point)
Responses

Beakers can be held over a flame; test tubes cannot.
Beakers can be held over a flame; test tubes cannot.

Beakers and test tubes both have rounded bottoms.
Beakers and test tubes both have rounded bottoms.

Beakers have liquid volume (mL) markings on the side of them; test tubes are unmarked.
Beakers have liquid volume (mL) markings on the side of them; test tubes are unmarked.

Test tubes are better for transferring liquids than beakers.
Test tubes are better for transferring liquids than beakers.

Answer 5

The accurate statement is:

Beakers have liquid volume (mL) markings on the side of them; test tubes are unmarked.

Beakers typically have volume markings for measuring, while test tubes usually do not have volume markings and are primarily used for mixing or holding small volumes of liquids.

Answer 6

Which is a disadvantage of using Celsius thermometers?(1 point)
Responses

They can contain mercury that is very harmful to humans.
They can contain mercury that is very harmful to humans.

They can measure the boiling point of a liquid.
They can measure the boiling point of a liquid.

They can measure temperatures of liquids quickly.
They can measure temperatures of liquids quickly.

They can take accurate temperature readings.

Answer 7

The correct response is:

They can contain mercury that is very harmful to humans.

This is a disadvantage as many traditional thermometers use mercury, which is toxic if broken and can pose health and safety risks.