Flash Cards Properties of Matter; Mix/Sol Review

Front

What experiment should Liam, Mason, and Aiden try to discover the relative density of small items?

Back

Insert each item into a tub of water and see which items sink and which items float.

Answer explanation

To determine relative density, placing items in water shows if they sink or float. Sinking indicates higher density than water, while floating indicates lower density. This method directly assesses density through buoyancy.

Front

Ava, Elijah, and Mia are working together in their science lab to find the best material to insulate electrical wires. They tested four different materials and recorded their results in the table below. Based on their data, which material should they choose to keep the wires safe from electricity?

Back

Material B

Answer explanation

Material B is the best insulator for electrical wires as it has the lowest electrical conductivity among the tested materials, which means it effectively prevents the flow of electricity, reducing the risk of short circuits.

Front

Objects: plastic bead (floats in water), metal block (sinks in water), rubber eraser (floats in water), marble (sinks in water). Which property of matter can split these objects into two groups?

Back

Relative density

Answer explanation

The objects can be separated based on relative density, as some float in water (plastic bead, rubber eraser) while others sink (metal block, marble). This property distinguishes them into two groups effectively.

Front

Which tool should be used to separate iron filings from sand?

Back

Magnet

Answer explanation

A magnet is the best tool to separate iron filings from sand because iron is magnetic, while sand is not. The magnet will attract the iron filings, allowing for easy separation from the non-magnetic sand.

Front

Which of these mixtures can be separated most easily using a strainer? Marbles and plastic cubes, Dish soap and water, Pebbles and sand

Back

Pebbles and sand

Answer explanation

Pebbles and sand can be separated easily using a strainer because the pebbles are larger and will not pass through the holes, while the sand will. This makes it a straightforward physical separation method.

Front

When sugar dissolves in lemonade, which property of the sugar stays the same?

Back

Taste

Answer explanation

The taste of sugar remains the same when dissolved in lemonade. While it may change form, its sweet flavor is unchanged, making 'A. Taste' the correct choice. The color of sugar does not affect its taste.

Front

Which material will mix and form a solution with water when grapes and salt are added to a plastic bottle filled with water and shaken?

Back

Salt

Answer explanation

Salt will dissolve in water, forming a solution, while plastic does not interact with water in this way. Therefore, the correct choice is salt.

Front

What happens when lemon juice is mixed with water?

Back

The lemon juice dissolves and spreads evenly throughout the water.

Answer explanation

When lemon juice is combined with water, it dissolves and spreads evenly throughout the water, creating a uniform solution. This is the correct change that occurs, unlike the other options which are incorrect.

Front

How many grams of salt can the team expect to find left in the pan after boiling and evaporating 1,000ml of water with 50 grams of salt?

Back

50 grams

Answer explanation

After boiling, all the water evaporates, leaving the salt behind. Since 50 grams of salt were initially added, the lab team can expect to find 50 grams of salt in the pan after Step 3.