Tools
What is a sieve?
1. A magnet
2. A color
3. A weight
4. A strainer
4. a strainer
How would you separate metal and rice?
1. by color
2. by size
3. by shape
4. by magnetism
4. by magnetism
Ms. Esposito has a sore throat from yelling and wants to make salt water to gargle. The salt is not dissolving fast enough while stirring. What should Ms. Esposito do?
A. pray her students start listening
B. stir the salt slower
C. Add cold water
D. stir the salt faster
D. stir the salt faster
Skylar and Stella wanted to find out which material would insulate their teacher's coffee cup and keep the coffee hot for the longest period of time. They first wrapped her cup with bubble wrap and recorded the temperature of the coffee once every 15 minutes for 2 hours. Skylar and Stella repeated the investigation, this time using newspaper instead of bubble wrap, but they got the same results for both materials. Which of the following would be the best way to make sure their results are valid?
A. Repeat the investigation.
B. Switch to tea instead of coffee.
C. Change the material again and use a different thermometer.
D. Conduct their investigation in a colder room and test for 3 hours.
A. Repeat the investigation.
True or False:
A mixture is not easily separated?
False: A mixture is easy to separate.
How could you separate pennies and dimes?
A. by shape
B. by color
C. by magnetism
4. by hardness
B. by color
Ms. Shephard has a bucket of saltwater. Which of the following would be the best way to remove the water so that Ms. Shephard is left with only salt?
A. Stir the saltwater for a long time. The salt will form a crystal.
B. Leave the saltwater to sit for a long time. The salt will settle to the bottom.
C. Boil the saltwater. The water will evaporate and only the salt will remain.
D. Freeze the saltwater. The water will sink to the bottom and the salt will rise to the top
C. Boil the saltwater. The water will evaporate and only the salt will remain.
Mrs. Peterson likes to experiment using the medium-sized magnet on her refrigerator. She holds the medium-sized magnet over a pile of paperclips and counts how many are attracted to the magnet. She asks the question, "Does the size of a magnet affect the magnetic attraction of paperclips?" Mrs. Peterson finds a larger magnet and a smaller magnet to do the same test. Which of the following would Mrs. Peterson most likely use as a control group in her experiment?
A. the larger magnet
B. the smaller magnet
C. the medium-sized magnet
D. the paperclips the magnet picked up
C. the medium-sized magnet
True or False:
A solution is not easy to separate.
True: If a solution is not easily separated.
Which of the following would be the best way to separate the salt and the iron filings?
A. Use a magnet to pull the iron filings from the salt.
B. Add food coloring to the mixture to make the salt change color.
C. Pour them into a beaker of water and see if the iron filings float.
D. Heat up the mixture to see if the salt or the iron filings will burn away
A. Use a magnet to pull the iron filings from the salt.
Mrs. Rutenber has a mixture of iron filings, foam pellets, sand, and sugar. After separating the iron filings and foam pellets from the mixture, what would Mrs. Rutenber most likely need to do to separate the rest of the mixture?
A. Filter the sand, evaporate the water, and then dissolve the sugar.
B. Filter the sand, dissolve the sugar, and then evaporate the water.
C. Dissolve the sugar, filter the sand, and then evaporate the water.
D. Dissolve the sugar, evaporate the water, and then filter the sand
C. Dissolve the sugar, filter the sand, and then evaporate the water.
What is a control group?
A. A group that changes the variable
B. The group that applies the variable
C. The group that tests the variable
D. A test group where the variable is not changed or applied
D. A test group where the variable is not changed or applied