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WorksheetsChemical Reactions 2
Total questions: 26
Worksheet time: 14mins
Marie and Fatima are watching icicles melt off a roof. Which type of change is occurring?
Chemical change
Physical change
Biological change
Emotional change
During a science experiment, Mr. Dub observed a substance in the lab. Which of the following occurs during the physical change he observed?
The substance's atoms rearrange.
The appearance changes.
The substance changes color.
The substance changes state.
During a science experiment, Jordan and Marie observed a chemical change. Which of the following did they most likely observe?
Formation of new substances
Change in physical appearance
Change in temperature
Change in state of matter
During a science class, Ms.G asked her students to identify an example of a physical change. Which of the following did Sneijdre choose?
Burning paper
a cake being baked
an explosion
Breaking a glass bottle into pieces
A melting bowl of ice cream at Jordan's birthday party, which was beautifully organized by Ms. G, is an example of a __________.
solidification process
chemical change
sublimation reaction
physical change
When Marie dissolves baking soda in water during a science experiment, she is watching a __________.
physical change
chemical change
Jaden and Fatima shred newspaper to put in their pet gerbil’s cage. Jaden says they chemically changed the properties of the newspaper. Fatima says they physically changed the properties of the newspaper. Who is correct?
Fatima
Jaden
The gerbil
Sneijdre and Mr. Dub mixed two substances in a scientific experiment and watched as one of the substances dissolved in the other substance. Which type of change occurred?
chemical
physical
Marie, Jaden, and Mr. Dub mixed two substances in a scientific experiment and caused an explosion. Which type of change likely occurred?
chemical
physical
Which type of change does NOT appear to be occurring when ice melts in the sun, as observed by Angeles and Steven?
Chemical change
Physical change
When Silvia, Steven, and Ms. G mix vinegar and baking soda to watch bubbles form, they are watching a __________.
chemical reaction
physical reaction
A dull, dark tarnished penny, found by Marie and Alexa during their science project supervised by Mr. Dub, has experienced a __________.
physical change
chemical change
In a science experiment conducted by Alexa and Mr. Razavi, which type of change(s) can be undone?
physical change
chemical change
During a science class, Ms.G asked her students to identify which of the following is NOT an example of a chemical change?
crumpling paper
Burning wood
banana turning brown and decomposing
Leaves turning yellow
During a science experiment, Steven and Jaden observed different changes. Which of the following is NOT an example of a chemical change?
Mixing baking soda and vinegar
Burning toast
Cereal getting soggy in milk
Cookies baking
During a science experiment, Mr. Razavi asked his students to identify a chemical change. Which of the following scenarios is an example of a chemical change?
Mixing salt and water to form a solution
Freezing water to form ice
Melting butter to form liquid
An explosion of wood and gunpowder
Marie and Fatima are learning about changes in their science class. Which of the following scenarios about bread includes a chemical change?
Bread dough being baked in the oven
Bread pounded into crumbs
Bread dough being kneaded
Bread dough being sliced
During a science experiment, Sneijdre and Fatima observed the weight of matter during chemical changes. What did they find?
The weight of matter disappears.
The weight of matter remains constant.
The weight of matter increases.
The weight of matter decreases.
Silvia and Jaden conducted an experiment to see what happens to water when it boils. They boiled 5 pounds of water until only 1 pound of liquid remained. They used special instruments to record all changes that occurred in the room. What is the total weight of the end product(s) of their experiment?
Starting weight 5 lbs
1 pound
3 pounds
4 pounds
5 pounds
Alexa noticed that a green banana has the same mass as a ripe one. Will the green banana weigh more or less than the ripe one?
equal
more
heavier
less
Silvia and Steven were studying physics together when Silvia tore up her homework assignment. How much did the paper weigh after she tore it up?
The weight of the paper triples.
The weight of the paper remains the same.
The weight of the paper becomes zero.
The weight of the paper doubles.
Steven, Jordan, and Fatima added 4 ounces of vinegar to a flask containing 4 ounces of baking soda and then quickly placed an empty balloon over the top of the flask. A chemical change occurred, causing the balloon to expand. How much did the flask and balloon weigh at the end of the experiment?
8 oz plus the balloon and flask
The weight of the flask and balloon decreased to 7 oz due to the chemical reaction
8 oz
The weight of the flask and balloon increased to 10 oz due to the addition of vinegar
Fatima, Angeles, and Ms. G baked 1,500 grams of bread dough together. After the bread baked, they weighed the loaf as 1000 grams. Explain what likely happened to the extra 500 grams.
The 500 grams were eaten by a bread-loving squirrel during baking.
The extra 500 grams turned into gold during baking.
The extra 500 grams likely evaporated as water during the baking process.
Fatima, Angeles, and Ms. G forgot to add the 500 grams of dough to the loaf.
Silvia and Ms. G filled a balloon with 8 grams of water and then filled the balloon the rest of the way with air. What was the final weight of the balloon?
less than 8
8 exactly
more than 8
who knows?
If Steven mixes 15 grams of salt with 40 grams of water, how many grams of matter will they have after the salt is completely dissolved?
(a) grams
During a science experiment, Jordan and Silvia mixed two chemicals together. According to the law of conservation of mass, the mass (weight) of the reactants is (a) the mass (weight) of the products in the reaction.
