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Transcript of Do Now: Sit in your lab groups from yesterday 1. What are the four signs/indicators that a chemical...
![Page 1: Do Now: Sit in your lab groups from yesterday 1. What are the four signs/indicators that a chemical change has occurred 2. Which sign(s) did you see in.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f2c5503460f94c47b2a/html5/thumbnails/1.jpg)
Do Now:
Sit in your lab groups from yesterday
1. What are the four signs/indicators that a chemical change has occurred
2. Which sign(s) did you see in the exploding stomach lab yesterday?
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Options for Review
1. Bingo Review Game with teams
2. Work on review worksheet independently or with a partner quietly on the other side of the room
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Review Bingo!10/9
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Step 1: Draw a 5x5 table that takes up the entire half sheet of paper
FREE
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Step 2: Select 24 of the following answers to fill in the remaining blanks of your table (in any order that you wish) – USE A PEN!
Accuracy Precision
Oxygen gas CFCs
Stratosphere
Qualitative Quantitative
Control
Independent variable
Dependent variable
Graduated cylinder
Meter stick Scale Meter
Liter Gram 2.74% 20.5% 14% 15% 5.45 19.3 8.96
7.88 42.3 17.2 2.4 4.9 20.2
45.923 1365 80
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How it works
1. I will ask a question, you will work with your group to answer the question on the whiteboard.
2. Every group needs to have attempted to answer the question before the answer is revealed
3. If it is a calculation, you must show your work on the board. Groups may be asked to work the problem out for the class
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How it works:
4. In order to cross off a box on your bingo card:
Your group must have the correct answer on the whiteboard
The answer must be on your card
5. If someone has a bingo, their team wins an extra credit point on the exam and, time permitting, we’ll continue playing.
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Expectations:Be respectfulAll decisions are finalDo your best…and then you’ll
rock the test! (haha it rhymes)
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Question 1
This word means how close a set of measurements are to each
other
Precision
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Question 2
If Joseph measured a room to be 32.0 feet in length, but it was
actually 32.9 feet in length, what is the percent error?
2.74%
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Question 3
The ozone layer is located in what layer of the atmosphere?
stratosphere
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Question 4
If an object has a mass of 43.6 g and a volume of 8.00 mL, what is
the density of the object?
5.45 g/mL
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Question 5
If the initial volume in a graduated cylinder is 10.8 mL and the
volume increases to 53.1 mL after we add an object, what is
the volume of the object?
42.3 mL
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Question 6
If 5 batches of cookies feeds 24 people, how many batches of cookies are needed to feed 97
people?
20.2 batches
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Question 7
Ozone is made from what?
Oxygen gas
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Question 8
A piece of gold has a volume of 67.0 mL and a mass of 1293.1 g.
What is the density of gold?
19.3 g/mL
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Question 9
If the initial volume in a graduated cylinder is 24.5 mL, and the volume increases to 41.7 mL
after we add a rock to the cylinder, what is the volume of
the rock?
17.2 mL
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Question 10
What term is defined as “the thing that changes as a result of what
the scientist changes”?
dependent variable
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Question 11
If Matthew estimated that a piece of deep dish pizza weighed 237g, but it really weighed 298g, what
is the percent error?
20.5%
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Question 12
A sample of pennies has a mass of 39.0 g and a volume of 4.35 mL.
What is the density of the pennies?
8.96 g/mL
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Question 13
Samuel noticed that there are 36 desks in the classroom. What kind of observation is this?
quantitative
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Question 14
What term is defined as “the thing that the scientist changes in an
experiment”?
independent variable
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Question 15
If there are 1000 mL in a liter, 45,923 mL is how many liters?
45.923 L
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Question 16
Brenda noticed that Yosselin was wearing a brand new pair of white shoes. What type of
observation did Brenda make?
qualitative
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Question 17
10 nails have a total volume of 5.65 mL and a mass of 44.5 g.
What is the density of the nails?
7.88 g/mL
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Question 18
What is the standard unit used to measure length?
meter
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Question 19
What term is defined to be “the standard for making
comparisons”?
control
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Question 20
Lauren estimated that she could drink 40 ounces of juice in a
minutes, but she could only drink 35 ounces. What is the percent
error?
14%
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Question 21
If we start off with 9.0 mL of water in a graduated cylinder and we
add an object so that the volume increases to 11.4 mL, what is the
volume of the object?
2.4 mL
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Question 22
If there are 5 teachers for every 155 students, how many teachers
are needed for 2480 students?
80 teachers
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Question 23
Eric thought the bus would arrive in 20 minutes, but it really took 17. What is the percent error?
15%
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Question 24
If a car goes 65 miles per hour, how many miles can the car drive
in 21 hours?
1,365 miles
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Question 25
This word means how close a measurement is to the actual
value
accuracy
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Question 26
What is the standard tool used to measure volume?
Graduated Cylinder!
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Question 27
What man-made chemicals increase the size of the hole in
the ozone layer?
CFCs
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Question 28
If there is 39.5 mL of water in a graduated cylinder and the
volume increases to 44.4 mL after we add an object to the
cylinder, what is the volume of the object?
4.9 mL
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Question 29
What is the standard tool used to measure mass?
Scale
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Question 30
This term means a ratio that relates two different units of
measurement
Conversion Factor
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Question 31
What is the standard tool used to measure length?
Meter stick or ruler
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Question 32
What is the standard unit used to measure volume?
liter