PLS HELP SOMEONE PLS 99 POINTS! A scientist is conducting research to see whether dogs or cats are more popular. He goes to a dog park and asks all of the owners which pet they prefer. 100% of those polled stated that dogs are their favorite animal.
This experiment is an example of:
A) personal bias
B) experimental bias
C) cultural bias
D) a controlled experiment
2)
Trina walked into the kitchen and saw that the cake she'd put in the refrigerator the night before was gone. She said to herself "Dad must've eaten the cake when he got home last night."
Trina's statement can be classified as a(n):
A) observation
B) conclusion
C) hypothesis
D) inference
3)
What is the independent variable in an experiment?
A) The variable that remains the same throughout the experiment.
B) The variable being tested in the experiment.
C) The variable being measured in an experiment.
4)
A group of parts that work together is called a:
A) technology
B) system
C) process
D) feedback
5)
What is the difference between mass and weight?
A) Mass measures the force of gravity and weight measures volume.
B) Mass is measured in metric units and weight is measured in US Standard System.
C) Mass measures amount of matter in an object and weight measures the force of gravity.
D) Mass measures volume and weight measures the force of gravity.
6)
A student hypothesizes that a goldfish will be more active in a bowl that has red gravel than in a bowl with grey gravel. To test this hypothesis, the student places one goldfish in a bowl with red gravel and another goldfish in the same type of bowl with grey gravel.
What type of variable is the fish bowl?
A) control
B) independent
C) manipulated
D) dependent
7)
You study for a test and you believe you'll get an A on the test. This is an example of:
A) conclusion
B) prediction
C) inference
D) hypothesis
8)
An air conditioning unit turns off once it reaches its goal temperature. The house warms up and the air conditioning unit turns on again.
When the air conditioning unit turns on, it is an example of:
A) input
B) process
C) output
D) feedback
9)
Why do scientists use the International System of Units (SI)?
A) because the SI is based on the metric system.
B) because the tools scientists use only measue in SI units.
C) so they can communicate their results without confusion.
D) because the SI units are written in English.
10)
A scientific hypothesis must be:
A) correct
B) able to be manipulated
C) able to be controlled
D) able to be tested
11)
What type of variable should there only be one of in an experiment?
A) dependent
B) independent
C) control
D) responding
12)
An example of International System of Measurement (SI) unit is:
A) pound
B) mile
C) liter
D) ounce
13)
Adam tested how music affects plant growth.
What is the dependent variable in the experiment?
A) type of bush
B) music
C) plant growth
D) soil
14)
What is an example of a qualitative observation?
A) red book
B) 100 mL
C) twenty cats
D) 50 km/hr
15)
Which example is NOT a model?
A) foam planets
B) plastic skeleton
C) atom made of fruit
D) skin cells