Category 1
What tool is used to measure time intervals accurately?
Stopwatch
The "Exploding Bomb" symbol indicates that a substance is flammable but not explosive.(True or False)
False
Mark sees his plant grew taller in more sunlight. What skill is this?
A) Observing
B) Inferring
C) Concluding
D) Measuring
C) Concluding
How many significant figures are in the number 0.004560?
4
NaCl
Sodium chloride
Which tool is used to measure length or distance?
Meter stick
The "Exclamation Mark" symbol is used for chemicals that may cause skin irritation, eye irritation, or respiratory issues.(True or False)
True
Lisa records the color and shape of leaves. What skill is she using?
A) Measuring
B) Observing
C) Predicting
D) Concluding
B) Observing
How many significant figures are in the number 120.030?
6
carbon dioxide
CO₂
What equipment is used to support other apparatus, such as clamps and rings, during experiments?
Iron stand
The "Corrosion" symbol is used for chemicals that can damage metals, skin, and eyes.(True or False)
True
Sarah sees dark clouds and says, "It might rain." What skill is this?
A) Observing
B) Measuring
C) Predicting
D) Concluding
C) Predicting
How many significant figures are in the number 7.800 × 10³?
4
Fe₂O₃
Iron(III) oxide
Which instrument is used to measure temperature?
Thermometer
The "Flame" symbol represents chemicals that are corrosive to metals and human tissue.(True or False)
False
Jenny makes a graph of daily temperatures. What skill is this?
A) Measuring
B) Observing
C) Predicting
D) Analyzing data
D) Analyzing data
How many significant figures are in the number 0.00050700?
5
N₂O₅
dinitrogen pentoxide
What type of container is specifically designed to store and hold chemical?
Reagent bottle
The "Health Hazard" symbol warns about long-term health effects such as cancer or respiratory issues.(True or False)
True
Jake pours 250 mL of water into a beaker. What skill is this?
A) Measuring
B) Observing
C) Analyzing data
D) Predicting
A) Measuring
How many significant figures are in the number 500600?
5
Ammonium sulfate
(NH₄)₂SO₄