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WorksheetsUnit 1 Review
Total questions: 75
Worksheet time: 3hrs 30mins
What should you do if there is an accident during a lab?
Clean it up
Notify the teacher immediately
Pretend it never happened
Keep quiet
stopper
forceps
tripod stand
test tube holder
A bowl and club used for grinding
erlenmyer flask
test tube
mortar and pestle
petri dish
0.000008
How many significant figures are there in 1008 grams?
1
2
3
4
(12.470)(271)
24.28 + 12.5
5 cm/min = ______ m/day
(100 cm = 1 m)
What is the last step of scientific method?
hypothesis
observe
communicate
question
The information you collect while doing your experiment is called
conclusions
data
hypotheses
procedures
The variable that is being measured or observed is called the _______________. Hint: this is the variable that is the result or effect
independent variable
dependent variable
control variable
The independent variable is
The variable that you change in an investigation
The variable that you measure in an investigation
A variable that you keep the same in an investigation
The process of obtaining information by using the senses is called a/an
Conclusion
Observation
Inquiry
Scientific method
What is a physical or mental representation of an object or an event?
a theory
a hypothesis
a model
a scientific law
Data gathered using the senses are referred to ___________.
quantitative data
logical data
measured data
qualitative data
An explanation based on many repeated observations during experiments.
conclusion
scientific law
theory
hypothesis
A general statement that describes a patterns that are often observed in nature.
logical law
civil law
moral law
scientific law
Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.
What is the independent variable?
Dropping the same way
Wing Length
Amount of time it takes the helicopter to hit the floor
Dropping from the same height
Cindy wanted to find out how the amount of sunlight affects the growth of plants. She placed two tomato plants in 10 inch pots with potting soil and watered them ¼ cup each day. One plant was placed under a cardboard box and one was placed in the sunlight. She measured the growth of the plant each week for three weeks.
What are two CONSTANTS? (Select 2)
Using the same type of plant
Each plant was placed in a 10 inch pot
The growth of the plant
One plant is in the sunlight and the other is under a box
Marcia went to the grocery store and bought a bag of Doritoes. She estimated there would be 350 chips in the bag, but realized there were only 210 chips in the package. What was her percent error?
67%
35%
92%
45%
During class, students measured the length of a shelf. Their answer was 12 cm. The actual measurement was 14.25 com. What was their percent error?
15.79%
18%
2.25%
18.75%
Connie estimates the weight of her dog to be 8 pounds. The actual weight of the dog was 10 pounds. Find the percent error.
80%
15%
20%
25%
1. what state of matter is characterized by a definite volume and an indefinite shapes?
a. solid
b. liquid
c. gas
d. plasma
4. which property could NOT be used to distinguish between table salt and table sugar?
a. color
b. density
c. boiling point
d. melting point
6. in this classification of matter that is combination of two or more substances that are physically combined
a. pure substance
b. mixture
c. matter
d. mass
10. which of the following is an example of physical changes?
a. cutting of wood
b. burning of paper
c. melting ice
d. rusting
Fe is the ___________________ for iron
Letters
Chemical Symbol
Equation
A ___________ is a combination of many different elements not chemically combined.
Element
Compound
Mixture
What state of matter is pictured?
Solid
Liquid
Gas
Plasma
Which phase change absorbs energy to take place?
freezing
condensation
evaporation
all of the above
