Category 1 Science Review

What do you call the temperature at which a liquid turns into a gas?

• Boiling point

• Condensing point

• Freezing Point

• Melting Point

Mariela mixes one cup of sand with one-fourth cup of iron fillings. She then wonders, what can she do to separate the two substances in the mixture. Which tool should she use?

• Beaker

• Filter

• Magnet

• Spoon

Which of the following does NOT have mass?

• Empty box

• Air in a balloon

• Water in a bucket

• Light from a flashlight

Yuridia poured three tablespoons of oil into a glass of water. She stirred the water and then set the glass aside for one hour. When she looked at the glass again, the oil had floated to the top. Which is the best explanation for this?

• Oil is heavier than water.

• Oil is not soluble.

• Oil needs a longer time to dissolve.

• Yuridia put too much oil in the water.

Christopher combined almonds, peanuts, chopped cherries, and raisins for a snack. Why would Christopher's snack be considered a mixture?

• He used only nuts and fruits in the snack.

• Each item in the snack kept its physical properties.

• When combined, the look of each item changed.

• The taste of each item changed when combined with others.

Mrs. Robinson dissolved 50 grams of salt in 300 milliliters of water. She set the solution aside until all the water evaporated. How many grams of salt should have been left in the glass container after the water had evaporated?

• 250g

• 250ml

• 50g

• 300ml

What are the two ends of a magnet called?

• Attractors

• Metals

• Points

• Poles

Which of the items listed would most likely be attracted to a magnet?

• Glass jar, foam cup, paper clip

• Nail, paper clip, key

• Nail, pencil, aluminum foil

• Pencil, paper clip, cup

Miss. Dunkin is cooking spaghetti sauce for her husband. He tells her to stir the sauce with a wooden spoon, not a metal one. Why does he suggest for her to utilize a wooden spoon?

• Wood will not change the taste of the sause.

• Wood is a poor conductor of heat, so Miss. Dunkin won't burn her fingers.

• Wood does a better job of combining mixtures like spaghetti sause.

• Wood is a good insulator and will conduct heat away from Miss. Dunkin's fingers.

Melanie made a sugar-water solution for a scientist experiment. What proceess could she use to separate the sugar from the water?

• Combination

• Condensation

• Evaporation

• Precipitation