True or False
Magnets
Nature of Science
Energy
Physical & Chemical Change
100
Two magnets have to touch each other to make them attract or repel.
False. Magnets do not have to touch.
100
Which of these classroom objects would be attracted to a magnet?
Eraser, Paper clip, Pen, Crayon
The paper clip
100
Students are choosing a tree to use for a wildlife project to attract insects. The students use observations to help them decide which tree to choose for the project. Which of these questions can be answered through scientific investigation?
Which tree has the prettiest leaves?
Which tree has the biggest flowers?
Which tree has flowers that smell the best?
Which tree has leaves with the best shape?
Which tree has the biggest flowers?
100
Heat always flows from ______________ to _____________.
Hot to Cold
100
What is the definition of a physical change?
A change of a substance from one form to another without a change in its chemical properties. (It does not result in the formation of a new substance.)
200
Scientists should change their results to match their prediction.
False, Prediction is an educated guess
200
Taylor put the North side of one magnet near the South side of another magnet. What happened next?
The magnets were attracted to each other, or pulled together.
200
Observation vs Inference
Vary
200
A _______ pitch is produced when sound waves are vibrating slowly.
A _______ pitch is produced when sound waves
are vibrating quickly.
Low
High
200
What is the definition of a chemical change?
A process by which substances are changed into different substances with new properties.
300
Low pitch has Slow and far apart waves
True
300
Explain why these ring magnets appear to be floating.
The “like” sides of the magnets are facing each other, which causes them to repel, or push away from each other.
300
Nathan conducts an experiment that tests the effects of different types of soil on the growth of cactus plants. His results do not match his prediction. What should Nathan do?
Change his prediction
Change the steps in his experiment
Repeat the experiment to see whether it is valid
Change the data to match his prediction
Repeat the experiment to see whether it is valid
300
Give an example of each type of energy.
Light. Mechanical
Heat. Electrical
Chemical. Sound
Answers Vary
300
Jake dissolved some salt into water. How could she reverse this physical change?
She could leave it out and let the water evaporate. Evaporation is a physical change (a change in state from liquid to gas). The salt would be left behind with its original properties.
400
Breaking a log is chemical Change
False
400
What is the name of the tool used to measure mass?
Balance scale
400
Some students want to test how light affects the growth of seedlings. They must decide which method they will use to conduct this investigation. Which of the following should they perform?
get books from the library about how to grow plants
observe the seedlings and plants in the school yard
set up a controlled experiment using a lamp and a dark place
set up a number of plants in different windows in the classroom
set up a controlled experiment using a lamp and a dark place
400
Name two types of conductors and two types of insulators
Vary
400
Joy is making bread. First, she mixes the flour, sugar, and water. Then, she breaks the eggs. Next, she kneads the dough into different shapes. Finally, she bakes the bread in the oven.
Which step is an example of a chemical change?
Baking the bread in the oven is a chemical change.
500
When is your SBA Test? Thursday?
False
Friday
500
Stephanie measured the amount of water in a graduated cylinder and found it to be 15 mL. She placed a golf ball in the water, and it sank to the bottom of the cylinder. The volume of the water with the golf ball in it was 24 mL. What is the volume of the golf ball?
9 mL
500
Kerry decides to investigate the animals at a children’s zoo. At the zoo, Kerry observes several horses, including an adult horse and a foal, or baby horse, near it. Which of the observations below could be recorded as evidence?
A) The adult horse and foal are healthy.
B) The horse and the foal are brown.
C) The adult horse may be the parent of the foal.
D) The adult horse likes being next to the foal
B) The horse and the foal are brown.
500
What metal is not an conductor
rehydrated cans
500
Chris loves to make fruit salad. He slices up some apples, bananas, and grapes. As he eats it, his stomach acid begins to break down and digest his food. He leaves the leftovers out for his brother, but the apples turn brown.
Which of these is an example of a physical change?
When Chris slices up the fruit, that is an example of a physical change.