5th Science Prep 4

Imagine a thick ten-kilogram block of soap and a thin ten-kilogram sheet of soap. Which answer correctly explains which will dissolve first when they are both placed underwater?

• The sheet will dissolve first because it has more surface area.

• The sheet will dissolve first because it has less mass than the block.

• The block will dissolve first because it is less spread out than the sheet.

• The sheet and the block weigh the same, so they will take the same amount of time to dissolve.

Kayla wants to know if a sugar cube in a bowl of water will dissolve more quickly if it is stirred with a spoon than if it is left alone. Which answer explains the effect that stirring will have?

• Stirring makes the sugar move around, and it dissolves more slowly because it is not staying still.

• The sugar will dissolve more slowly because the movement of the water makes it stick together.

• The sugar dissolves more quickly because the motion of the spoon creates heat, which melts the sugar.

• When the sugar is stirred, more surface area will come into contact with the water, so the sugar dissolves more quickly.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Sam drops a sugar cube weighing one gram in a cup of cold water and lets it sit until the sugar cube dissolves. Malcolm adds one gram of powdered sugar to a cup of hot water and stirs it with a spoon. Rosa adds a one-gram packet of sugar granules to a cup of cold water and stirs it with a spoon. Angela adds a sugar crystal weighing one gram to a cup of hot water and does not stir it. Whose sugar is most likely to dissolve the fastest, and whose is slowest?

• Malcolm's sugar dissolves fastest, and Sam's dissolves slowest.

• Rosa's sugar dissolves fastest, and Malcolm's dissolves slowest.

• Sam's sugar dissolves fastest, and Angela's dissolves slowest.

• Angela's sugar dissolves fastest, and Rosa's dissolves slowest.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Bar magnets have a north pole (N) and a south pole (S). Latrisha places a bar magnet on three small straws so that it can roll. Her setup is shown below. Placing which of the following objects at point X will cause the bar magnet to move away from point X?

• An iron nail

• An aluminum can

• The north end of another bar magnet

• The south end of another bar magnet

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Arianna uses balloons to investigate static electricity. Which of the following best explains what will happen when she brings two positively charged balloons close to each other.

• The balloons will move apart.

• One balloon will lose its charge.

• The balloons will come together.

• One balloon will gain a negative charge.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Guy’s drawing of the water cycle shows the heat from the Sun making ocean water evaporate. Which best explains this change?

• Chemical change from liquid to gas

• Chemical change from liquid to solid

• Physical change from liquid to gas

• Physical change from liquid to solid

Tags

NGSS.MS-ESS2-4

One morning, Ryan noticed there were tiny drops of water on the grass as he walked to school. That afternoon, he did not see any drops of water on the grass when he returned home. Which of the following best explains what happened to the drops of water?

• The heat from the air caused the water drops to boil.

• The air cooled the water and caused the drops to freeze.

• The Sun heated the water and caused the drops to evaporate.

• The energy from the Sun caused the water drops to condense.

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-1

On a sunny day, Elena is cutting branches from a tree in her yard. At midday, she takes a break, leaving a pile of branches and leaves on the ground. When she returns and gathers the branches, she notices the leaves are wilted and crisp. Which of the following correctly describes what happened to the leaves?

• The trees had not received water for a long time before being cut.

• The warm temperature caused moisture to evaporate from the leaves.

• The nutrients cannot reach the leaves if the tree's branches are not upright.

• The leaves had been covered in frost the week before, but had not wilted until now.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Imagine that you fill a bucket to the top with water and then place the bucket outside in freezing weather. Which of the following describes what will happen when the water in the bucket freezes?

• The level of the water and the bucket itself will not be changed by becoming frozen.

• The level of the water will be lower once it is frozen and the molecules are more compact.

• The sides of the bucket will be pushed out and the level of the water will be above the rim of the bucket.

• The level of the water will be uneven once it is frozen because some of the water will remain as a liquid in the bucket.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following describes an example of a material undergoing a chemical change to become another material with different characteristics?

• Iron turns to rust when it is exposed to oxygen.

• When water boils, it turns into vapor, which is a gas.

• Oxygen can become liquid at a very low temperature.

• Gold can be spread out very thin to cover a large area.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5