Separation of Mixtures Quiz

The pictures show tools that can be used for separating mixtures. Which mixture is paired with the best tool for separating the materials?

• Salt and pepper - Tweezers

• Pieces of cork and pebbles - Beaker of water

• Safety pins and iron nails - Magnet

• Sand and iron filings - Colander

A student makes a mixture of gravel, iron filings, and water. Which table correctly identifies the tools that can be used to separate each substance from the mixture?

• A. Screen - Gravel, Magnet - Iron filings, Paper filter - Water

• B. Funnel - Gravel, Paper filter - Iron filings, Hot plate - Water

• C. Screen - Gravel, Hot Plate - Iron filings, Funnel - Water

• D. Paper filter - Gravel, Magnet - Iron filings, Screen - Water

A person heats 500 milliliters of water in a beaker. Then the person stirs 10 grams of table sugar into the water. Which property will the sugar keep after it has dissolved in the water?

• Its grainy texture

• Its whitish color

• Its temperature

• Its sweetness

A student heats 250 milliliters of water in a cup to approximately 50 °C and adds 6 grams of salt. The mixture of salt and water is then stirred for 15 seconds. Which results will the student MOST LIKELY observe after the mixture has been stirred for 15 seconds? Select TWO correct answers.

• The salt will dissolve.

• The salt will sink to the bottom of the cup.

• The water will remain clear.

• The salt will float on the water.

• The water will change from clear to opaque white.

Part A: Which material will keep a hot drink warm for the longest period of time?

• Material 1

• Material 2

• Material 3

• Material 4

Part B: Which statement BEST supports the answer to Part A?

• The material that will keep the drink warm longest insulates thermal energy inside the cup.

• The material that will keep the drink warm longest conducts thermal energy into the cup.

• The material that will keep the drink warm longest conducts thermal energy away from the cup.

• The material that will keep the drink warm longest insulates thermal energy from entering the cup.

Students poured water and cooking oil into a beaker. The students then added a penny, a plastic paper clip, and a cork to the beaker and recorded their observations. Observations: - The water was on the bottom, and the oil was on top of the water. - The penny dropped to the bottom of the beaker. - The plastic paper clip floated on the water but under the oil. - The cork floated on top of the oil. Which list puts the items in order from most dense to least dense?

• Cork, oil, plastic paper clip, water, penny

• Water, penny, oil, plastic paper clip, cork

• Penny, water, plastic paper clip, oil, cork

• Oil, penny, cork, plastic paper clip, water

A student makes a mixture of gravel, iron filings, and water. Which table correctly identifies the tools that can be used to separate each substance from the mixture?

• A) Screen - Gravel, Magnet - Iron filings, Paper filter - Water

• B) Funnel - Gravel, Paper filter - Iron filings, Hot plate - Water

• C) Screen - Gravel, Hot Plate - Iron filings, Funnel - Water

• D) Paper filter - Gravel, Magnet - Iron filings, Screen - Water

Which mixture is paired with the best tool for separating the materials?

• Salt and pepper - Tweezers

• Pieces of cork and pebbles - Beaker of water

• Safety pins and iron nails - Magnet

• Sand and iron filings - Colander

A student builds the circuit shown. The student closes Switch 1 and Switch 3. Which lightbulb will glow? Select ONE correct answer.

• L1

• L2

• L3

• L4