Mixing it Up Review

Which end of the magnet will be attracted to the north end of the compass?

• North

• South

Andi is sorting his toys. He found a jar of metal coins, plastic legos, and glass marbles. Explain to him step by step the best way to sort the objects in the jar using only a magnet and a glass of water.

The powder is being ___________ by the water.

• disappeared

• condensed

• dissolved

• melted

Tags

CCSS.RI.4.3

CCSS.RI.4.5

CCSS.RI.5.3

CCSS.RI.5.5

CCSS.RI.6.5

What happens to the powder once it dissolves?

Which of the following are conductors of electrical energy? You can select more than one.

• wood

• glass

• copper

• steel

Which of the following are insulators of electrical energy? You can select more than one.

• wood

• glass

• copper

• steel

In our tea investigation, there were different concentrations (amounts) of tea in each of the samples. Describe the relationship between the concentration level of the tea and the color of the tea.

Which of the following mixtures are also solutions?

• salt, water, lemon juice

• sugar, water, salt

• flour, sugar, cornstarch

• pebbles, soil, wood chips

Answer explanation

A solution means one substance has been DISSOLVED into another substance.

True or False? A solid will remain a solid until it reaches its melting point.

• True

• False

True or False? The size of an object determines whether it will sink or float in water.

• True

• False

Answer explanation

Density, how compact an object is (how little air it contains) determines whether it will sink or float.