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WorksheetsSemester Exam 2024
Total questions: 42
Worksheet time: 21mins
Which instrument measures the length of an object?
beaker
graduated cylinder
triple beam balance
meter stick
What is the mass that is shown on each of the triple beam balances?
480.5g
408.5g
485.0g
Measure the following volumes.
85 ml
82 ml
80 ml
If you do not understand a direction or part of a laboratory procedure, you should ________.
figure it out as you do the lab.
try several methods until something works.
ask the teacher before proceeding.
skip it and go on to the next part
After completing an experiment, all chemical wastes should be
left at your lab station for the next class.
disposed of according to your teacher’s directions.
dumped in the sink.
taken home.
Horseplay, practical jokes, or pranks in the lab are ________________.
okay.
When you work in the lab, long hair must be _______________.
Lisa boiled 5 cups of water in the pot. This is an example of a (n) _______________.
Qualitative observation
Quantitative observation
Inference
Conclusion
The grass turned brown and stiff at the end of July. This is an example of a (n) _______.
Hypothesis
Qualitative observation
Quantitative observation
Inference
For an experiment, a scientist put lime at the base of tomato plant A and baking soda at the base of tomato plant B. She then sealed the plants in plastic bags. Tomato plant A eventually died, and tomato plant B stayed healthy. What was the dependent variable in this experiment?
Type of plant grown for the test
Response of the plants to each substance
Substance at the base of each plant
Plastic bags wrapped around each plant
A student planted the same kind of seeds in pots A and B. She planted five seeds in pot A and five seeds in pot B. The amount and type of soil in both pots was the same. She added the same amount of water to both pots each week. Pot A was placed in a sunny window. Pot B was placed in a dark room. After four weeks, she observed the plants in both pots. The plants in pot A were green, with tall, thick stems. The plants in pot B were yellow, with tall, thin stems. Which statement best explains why the plants in pot A were different from the plants in pot B?
Pot A contained more soil than pot B.
Pot A contained more seeds than pot B.
Pot A received more sunlight than pot B.
Pot A received more water than pot B.
What is the smallest particle of matter?
Cells
Atoms
Electricity
Forces
Which of the following examples is an element?
Fe
CO2
H2O
Salt water
Carbon has a mass number of 12. Thus, it has ________ protons and ________ neutrons.
12, 12
What element does the Bohr model represent?
K: Atomic# 19 Atomic Mass: 39
Cl: Atomic# 17 Atomic Mass: 35
Ar: Atomic# 18 Atomic Mass: 40
F: Atomic# 9 Atomic Mass: 19
A combination of substances that can easily separate into its original parts is known as a(n) __________.
Compound
Mixture
Element
Atom
Substance that cannot be broken down into any other substances by chemical or physical means is a(n) __________.
Element
Mixture
Compound
Molecule
Two or more different elements chemically combined is a(n) __________.
Atom
Mixture
Molecule
Compound
Which mixture will be considered an example of a homogeneous mixture?
A beaker of water and oil
A beaker of sand and rocks
A beaker of water and Kool-Aid powder
A beaker of sand and water
A balanced chemical reaction obeys the law of
definite proportions.
conservation of energy.
conservation of matter.
ideal gas.
Melting point is an example of a ____________.
Chemical property
Physical property
Baking Bread is an example of a ______________.
Chemical Change
Physical Change
A saw cuts a log and creates sawdust is an example of a ______________.
Chemical Change
Physical Change
The Statue of Liberty changes from copper to green is an example of a ______________.
Chemical Change
Physical Change
Chocolate syrup dissolved in milk is an example of a ______________.
Chemical Change
Physical Change
Leaves changing color in the fall is an example of a ______________.
Chemical Change
Physical Change
Which is NOT a reactant in the chemical equation?
Water (H₂O)
Carbon Dioxide (CO₂)
Sunlight
Glucose (C₆H₁₂O₆)
Which element is not equal on both sides of the equation to support the Law of Conservation of Matter?
Ag + 2HCl → AgCl2 + H
H
Cl
Ag
According to the chemical equation above, in an Endothermic Reaction, heat energy is a _______.
Reactant
Released
Product
Not present
When you bake cookies in the oven, what is happening in terms of energy?
an endothermic reaction, absorbing heat from its surroundings
an endothermic reaction, releasing heat from its surroundings
an exothermic reaction, absorbing heat from the surroundings
an exothermic reaction, releasing heat from its surroundings
When calcium chloride is mixed with water, it gives off heat. This observation suggests that ____.
it is an endothermic reaction
the matter doesn’t change
a change in state has occurred
it is an exothermic reaction
Which organelle is the site for energy production in a cell?
Cytoplasm
Chloroplast
Mitochondria
Cell Membrane
Which organelle is responsible for controlling the activities of the cell?
Vacuole
Mitochondria
Nucleus
Cell Wall
Which organelle is much larger in plant cells and is responsible for storing water?
Vacuole
Cell Membrane
Nucleus
Chloroplast
What cell organelle carries out photosynthesis?
Cell Membrane
Mitochondria
Nucleus
Chloroplast
What cell organelle carries out cellular respiration?
Cell Membrane
Mitochondria
Nucleus
Chloroplast
What are the products of photosynthesis?
carbon dioxide & glucose
water & glucose
oxygen & carbon dioxide
glucose & oxygen
What are the products of cellular respiration?
carbon dioxide & water
water & glucose
oxygen & carbon dioxide
glucose & oxygen
Cellular Respiration occurs in what type of cell?
Plant cell
Animal Cell
Plant and animal cells
None of the above
Photosynthesis occurs in what type of cell?
Plant cell
Animal Cell
Plant and animal cells
None of the above
Why is cellular respiration an exothermic reaction?
energy is absorbed
the energy amount does not change
energy is released
energy doesn’t exist
(a) is an endothermic reaction.
