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WorksheetsUnit 3 Chapter 5
Total questions: 52
Worksheet time: 31mins
A town is having a water shortage, and the people in the town have been asked to reduce their use of the town’s water supply. A gardener wants to continue to water plants in a garden.
Which of the following would be the most effective way to water the plants and still reduce water use?
use soapy water
use filtered water
use water from water bottles sold in stores
use water from rain collected in large containers such as reservoirs
Humans need fresh, clean water to survive.
Which of these statements is true about fresh water?
An unlimited amount of fresh water is available on Earth.
In some places on Earth, fresh water is being used up faster that it can be replace.
The global population is currently decreasing, and people are using less fresh water.
Fresh water was once considered a renewable resource, but today it is considered an inexhaustible resource.
The Conservation of Matter (Conservation of Mass -a fundamental principle of classical physics) states that ______________________________
matter is not perfect.
matter cannot be created or destroyed.
matter can be of no value.
matter can be created or destroyed.
Water is boiled and steam is produced. This is a physical change because the water particles....
have turned into something new.
are still water particles.
have reacted with each other.
have been destroyed.
Select all of the following events in which a chemical change occurs.
Chocolate syrup dissolves into warm milk.
Toast is lightly charred in a toaster.
A sugar cube dissolves in coffee.
Pancakes cooking.
Sugar is heated until it turns into a brown caramel sauce.
Which of these is an example of a physical change?
Melting ice cream
Rusting metal
Baking a cake
Burning leaves
The city of Surprise, Arizona converts raw sewage into reclaimed water through filtering and disinfection. Most of Surprise's reclaimed water is used for agricultural irrigation, landscape irrigation, dust control, and recharging the aquifer. Approximately 3.2 million gallons per day are reused. What is one environmental benefit of filtering and reusing waste water?
It reduces the demand for liquid freshwater.
It is increase the over use of water.
It keeps golf courses and landscape grasses green.
It cannot be used during water restrictions in a drought.
Which of the following is an example of a chemical reaction?
Digestion in the stomach.
Someone dyeing their hair.
Slicing tomatoes.
Someone cutting ribbon.
Explain what the molecules of melting ice look like on the nanoscale.
Close together, then moving far apart
Two separate mixtures, then the mixtures combining
Two separate mixtures, then making a new or different substance
Moving far apart, then packing tightly
Explain what the molecules look like of red and blue paint mixing.
Close together, then moving far apart
Two separate mixtures, then the mixtures combine
Two separate mixtures, then making a new or different substance
Moving far apart, then packing tightly
Explain what the molecules look like of baking soda and vinegar mixing.
Close together, then moving far apart
Two separate mixtures, then the mixtures combining
Two separate mixtures, mix to make a new or different substance
Moving far apart, then packing tightly
How can you tell if a chemical reaction has occurred when mixing two substances?
Molecules have been broken apart and rearranged to form a new substance.
Molecules have been destroyed.
Molecules are erased
There are less molecules at the end.
When sunlight is present, the carbon dioxide and water inside a plant combine to make sugar and oxygen.
Is this a chemical change or physical change?
Physical change
Chemical Change
The people in a town want to help the environment. Which of the following is one way the people in the town can reduce human impact on the environment?
heat town buildings using oil and propane gas
build a housing development in a forested area
install street lights throughout the town so people can see at night
build a water-treatment plant that cleans and recycles wastewater
Use the information and your knowledge of science to answer the question.
Daniel was playing with a glow stick and noticed that something inside the glow stick seemed to break when he bent it. He researched how a glow stick works and found this information. What causes the glow stick to produce light?
A new material is formed when the glass mixes with Chemical W.
A new material is formed when the glow stick's temperature changes.
A new material is formed when Chemical X and Chemical W are shaken.
A new material is formed when Chemical X mixes with Chemical W.
Which evidence best supports the claim that a glow stick is a result of a chemical change?
The glow stick is brighter in cold temperatures.
The glass capsule is broken and cannot be fixed.
The glow stick produces light after the two chemicals are mixed.
The two chemicals are separated inside a solid container.
Use the information and your knowledge of science to answer the questions.
Dry ice goes from a solid directly to a gas when it gets warmer.
Students placed a small piece of dry ice inside a balloon, added air to the balloon, and sealed it. The figure shows the balloon and the dry ice at the beginning and end of the experiment.
Which statement best describes the balloon and the dry ice at the end of the experiment?
The total mass decreased and the total volume increased.
The total mass increased, and the total volume decreased.
The total mass remained the same, and the total volume increased.
The total mass decreased, and the total volume remained the same.
Which statement best explains how the total mass remained the same, and the total volume increased.
The dry ice inside the balloon got smaller over time.
The balloon expanded as it took in air from the room.
The balloon and the dry ice got warmer as they changed size.
The dry ice became a gas that was trapped inside the balloon
Students list ways people at their school can reduce landfill waste.
Ways to Reduce Landfill Waste at Our School
serve lunches on reusable plates
turn in some homework using email
copy worksheets on both sides of paper
replace paper towels with hand dryers
Which other idea would most likely be included on this list?
remove trash cans from hallways
turn off lights when leaving a room
replace old textbooks with newer ones
add recycle bins for paper in classrooms
If you have two identical glasses that each have five ice cubes in them and you let the ice cubes in one glass melt, which of the following will be true?
The glass with the ice cubes in it will weigh more than the other glass.
The glass with the ice cubes in it will weigh the same as the other glass.
The glass that has the melted ice in it will weigh more than the other glass.
The glass that has the melted ice in it will weigh twice as much as the other glass.
After lake water flows through a dam, which processes are most responsible for helping replace the water in the lake?
precipitation and runoff
transpiration and condensation
condensation and runoff
transpiration and precipitation
A student combined powdered paint with water to make a small amount of a blue liquid paint mixture. The student left the paint mixture in an open container. Several days later the student found the container and observed that changes had occurred. What most likely happened to the mixture?
The container was empty after the mixture evaporated into the air.
The paint evaporated, leaving only clear water in the container.
The water evaporated, leaving only a dry blue solid in the container.
The liquid paint mixture was lighter in color after some water evaporated.
Students completed four investigations where they combined two different substances.
Which investigation shows evidence that the chemical properties of the substances changed?
Sand sinks in water when water and sand are combined.
Salt dissolves in water when salt and water are combined.
Bubbles form when baking soda and vinegar are combined.
Vegetable oil coats the surface of lettuce when oil and lettuce are combined.
Coral reefs are home to many different organisms, including fish. However, they are often damaged by human activity.
A group of scientists wants to regrow coral in a reef damaged by chemical pollution. First, the scientists made a model of a possible solution. Next, they tested the model and collected data. They notice that their design keeps the water clean but is harmful to the fish.
What should they do next?
Redesign the product from scratch, and test it again.
Tell scientists everywhere to start making and using their design.
Look into how their design affects the biosphere, and make improvements.
Look into how their design affects the hydrosphere, and make improvements.
The diagram shows what happens when wood is burned.
Which statement best explains the change that occurs when wood is burned?
This is a physical change because the products can be changed back into wood.
This is a physical change because the products are different from the starting materials.
This is a chemical change because the products can be changed back into wood.
This is a chemical change because the products are different from the starting materials.
Before baking the cookies, the student measures the weight of the prepared cookie dough. Which graph best represents how the amount of matter inside the oven is affected by the cooking process?
The student decides to perform a separate investigation to see how baking with white sugar compares to baking with brown sugar. The student performs the following two procedures. Select two ways the student’s investigation could be changed to make it a fair test.
Use the same amount of butter in both procedures.
Combine the ingredients with a different tool.
Bake the mixtures for the same amount of time.
Use different ovens for both procedures.
Select one observation that would help the student decide whether a new substance was formed during the investigation.
The baked result has properties different from those of the original ingredients.
The oven is warmer after baking than it was before baking.
Both of the original ingredients can be seen in the baked result
The color of the original ingredients did not change during baking.
Look at the nanoscale model.
When hard popcorn seeds are heated, they become fluffy and tasty.
Is this a chemical change or physical change?
Physical Change
Chemical Change
Which of the following provide evidence that popping popcorn is a chemical change?
A new substance is created
Heat and Gas are released
The change CANNOT be reversed
The change CAN be reversed
Color and Odor Changed
what you can observe or measure about something that helps you figure out what it is e.g. size, color, shape, texture, etc.
substance
wastewater
matter
property
water that has been used and now contains harmful substances
substance
wastewater
matter
saltwater
wastewater treatment plant
turns saltwater into clean freshwater
turns freshwater into wastewater
treats house plants
turns wastewater into clean freshwater
a process in which substances change into different substances
evaporation
iterate
chemical reaction
condensation
What is the evidence of a chemical reaction when a slice of apple turns brown?
color change
taste change
temperature change
gas is made
light is made
What is evidence of a chemical reaction when fireworks explode? Select all that apply.
color change
taste change
temperature change
gas is made
light is made
What is the evidence of a chemical reaction of the statue of liberty turning green?
color change
taste change
temperature change
gas is made
light is made
What is the evidence of a chemical reaction when you mix paint colors?
color change
taste change
temperature change
gas is made
mixing paint is not a chemical reaction
What is the evidence of a chemical reaction when a candle is burning (3).
color change
taste change
temperature change
gas is made
light is made
Why would more rain form over Lake A than Lake B?
The water vapor molecules are moving higher into the atmosphere where it is colder.
The water vapor molecules are moving lower into the atmosphere where it is colder.
The water vapor molecules are moving higher into the atmosphere where it is warmer.
The water vapor molecules are moving lower into the atmosphere where it is colder warmer..
What happens to the atoms that make up the molecules of substances during a chemical reaction?
The atoms get mixed up and combine to make new atoms.
The atoms get mixed up, but the properties of the molecules do not change.
The atoms do not rearrange, the molecules stay the same.
The atoms get mixed up and make new molecules.
Based on the Law of Conservation of Matter, describe the relationship between the mass of the reactants and the mass of the products.
The mass of the products is always greater than the mass of the reactants.
The mass of the reactants is less than the mass of the products.
The mass of the reactants equals the mass of the products.
The mass of the reactants is greater than the mass of the products.
Matter can not be created nor destroyed: it can only be
Destroyed a little bit
Invisible
Rearranged, changed
None of the above
A student mixes 125 grams of sugar, 250 grams of water and 5 grams of flavoring. The solution weighs...
250 grams
380 grams
375 grams
400 grams
How many grams of CHOCOLATE POWDER are shown in the example of conservation of mass below?
450 g
465 g
0 g
15 g
How many kilograms of SMOKE are shown in the example of conservation of mass?
1 kg
30 kg
28 kg
3 kg
If a chemical reaction occurs in a closed system (no way for any part of the reaction to escape), how does the product mass compare to the reactant mass?
the mass would decrease
the mass would increase
the mass would stay the same
it depends on the type of reaction
Which picture below would correctly demonstrate the Law of Conservation of Matter if this picture is the reactants?
if each cube has a mass of 3 grams, what is the total mass of the cubes that spell out "cage"?
12 grams
20 grams
3 grams
9 grams
The student measures the combined weight of all the ingredients before the cookie dough is made. After the cookies are baked in the oven and allowed to cool, the student weighs the finished cookies. The weight of the cookies is less than that of their ingredients. Identify the causes for the lighter weight of the cookies compared to that of the ingredients.
Baked cookies weigh less than the initial ingredients is because an oven is not a closed system.
Baked cookies weigh less than the initial ingredients because water evaporates from the dough during the baking process; as the dough heats up, moisture escapes into the air, resulting in a lighter final product.
The oven is a closed system so nothing should escape.
