Nature Of Science Review Question Preview (ID: 30922)


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A student obsevres the temperature of water as 53 degrees celsius. How many many more degrees celsius must the temperature rise before it reaches the boiling temperature of water?
a) 47 degrees celsius
b) 43 degrees celsius
c) 53 degrees celsius
d) 159 degrees celsius

Four samples of water are measured in Liters: W= 50mL, X=100mL, Y=150mL, Z=200mL. If Sample W boils at a temperature of 100 degrees celsius, at which temperature would Sample Z be expected to boil?
a) 25 degrees celsius
b) 50 degrees celsius
c) 100 degrees celsius
d) 200 degrees celsius

Four students add sugar to their hot tea. Which property of sugar remains the same when the sugar is in the tea solution?
a) The taste of the sugar
b) The size of the sugar crystals
c) The color of the sugar
d) The texture of the sugar

Danny made a mixture using equal amounts of salt and pepper. The salt grains were the same size as the pepper grains. What should the student do to most easily separate the pepper from the salt?
a) Use a pair of tweezers to remove each grain of pepper
b) Run a smalll magnet through the mixture to attract the pepper
c) Put the mixture in water and filter the pepper out of the water
d) Use a strainer with a fine wire screen to remove the pepper

A mixture of beads with various sizes, each one is made of plastic, glass or steel, was placed in a container. The beads are easy to separate because-
a) all beads are less dense than water
b) all beads are solid
c) all beads have the same mass
d) all beads are attracted to a magnet

A small bowl contains a misture of toothpicks and glass marbles. The easiest way to separate the mixture WITHOUT touching it would be to-
a) add glue to the mixture
b) place a magnet in the bowl
c) pour the mixture into a paper cone
d) add water to the bowl

10g of four different powdered solids are added to four different beakers. 100mL of water are added to the beaker, stirred, and allowed to sit for an hour before recording observations. Which question is trying to get answered in this investigation?
a) At what water temperature do the substances dissolve?
b) How much water is needed to cause a substance to change state?
c) What causes a substance to sink when placed in water?
d) Which substances dissolve in water?

Khrystian added a powdered drink mix to water and the solution turned orange. Khrystian decided the taste was too strong, so she poured out half of the liquid and added more water. Which of the following most likely occured when the water was added?
a) The physical state changed.
b) The orange color became lighter.
c) The liquid had a sweeter taste.
d) None of the above

Nathan built a sidewalk and pressed salt particles into the concrete while it was still wet. When the concrete dried, Nathan washed the sidewalk with water. What most likely happened to the salt?
a) It evaporated into a gas.
b) It turned into concrete.
c) It dissolved in the water.
d) It turned into a solid.

Kathy observed liquid wax dripping down the side of a burning candle. Several hours after putting out the flame Kathy observed there was no longer any liquid on the side of the candle. Which statement explains what may have happened to the liquid?
a) The heat given off by the flame caused the candle wax to evaporate.
b) The liquid wax changed back into a solid as it cooled
c) The liquid wax condensed and was absorbed by the candle.
d) None of the above.

Khloe makes a model of the water cycle by using a cup, some water, and plastic wrap. After Khloe places the model near a sunny window, moisture forms on the inside of the plastic wrap. What change did Khloe most likely observe in the model?
a) Freezing
b) Condensation
c) The warming of air
d) The formation of clouds

Nichole and Kayla placed two ice cubes in separate bowls. One ice cube had a mass of 80g. The other had a mass of 40g. Which result would be the same for both ice cubes in this investigation?
a) The time it took each ice cube to melt completely.
b) The temperature at which each ice cube melted.
c) The amount of liquid produced on each plate.
d) The total volume of each cube.

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