Vocabulary
What is a physical change?
Which of the following would NOT provide evidence that supports a chemical change?
a. change in odor
b. change in color
c. presence of bubbles
d. change in size or shape
What is change in size or shape?
Which of the following is an example of a change that results in a new substance?
a. egg frying in a pan
b. water freezing into ice
c. paper being shredded
d. lump of clay being broken in two
What is "a. egg frying in a pan?"
During which part of an investigation would a scientist gather evidence?
What is "conducting an investigation?"
A change that produces a new substance, or different kind of matter.
What is a chemical change?
The students in Mr. Connor's class conduct an experiment on the conservation of mass. Carla's data is much different from everyone else's results. Which statement best explains why this happened?
a. Carla did not add her results to the chart correctly
b. Carla is more careful than the other students
c. Carla is a better scientist than the other students
d. Carla did not do the experiment correctly
What is "D. Carla did not do the experiment correctly."
Mrs. Nichols left a watering can in her garden for several weeks. During this time, it rained often. How does Mrs. Nichols know that a change has taken place that resulted in a new substance?
What is "the can has reddish rust?"
Sophia lights a candle, the wax begins to melt down the side of the candle. Which type of change does the melting wax describe?
What is physical change?
A chemical change in dead organisms over time.
What is decay?
Edwin and his friends see a tree and some plant matter that is decaying. What do Edwin and his friends observe about the tree and plant matter that is evidence a chemical change has happened?
What is change in color and smell?
Eva has a tower of 6 plastic cubes that are exactly alike. She places the tower on a pan balance and notes that the mass is 42 grams. What can Eva conclude is the mass of each cube?
What is 7 grams?
Alex is eating his snack during class. He chews his food and then swallows it. Describe what is happening.
What is "Alex's food is going through a physical change (chewing) and chemical change (digestion).
A brown color material that is made when oxygen and iron combine.
What is rust?
Mr. Kelley's science class is investigating how long it takes for water to boil when put on a hot plate. Which of the following is MOST LIKELY why the groups might all get different results?
a. the groups followed the same procedures
b. the groups used different amounts of water
c. the groups worked at different times of the day
d. the groups did not measure the temperature of the water
What is "B. the groups used different amounts of water?"
Lola's little sister builds a tower using blocks. If the total mass of the blocks in the tower is 150 grams, what can Lola predict will be the mass of the blocks if she takes them apart and places them on the digital scale?
What is 150 grams?
A scout snaps a twig in half and then burns the pieces in a campfire. How would you describe the change?
What is "a physical change followed by a chemical change?"
When the mass of a whole object is the same as the sum of its parts.
What is Law of Conservation of Mass?
Trent and Regan share a mini pizza for lunch. Each of the slices has the exact same mass. What can Trent and Regan conclude about the whole pizza?
What is "the total mass of all the slices will be same as the whole pizza?"
Which of the following items does NOT support a chemical change?
leaves decaying, icicles melting, wood burning, rust on a bicycle
What is "icicles melting?"
How do you know when a piece of fruit is starting to decay?
What is "it starts to change colors?"