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Total questions: 58
Worksheet time: 36mins
Which statement best explains how periods on the periodic table are organized?
increasing atomic number from left to right
increasing number of neutrons from left to right
decreasing number of electrons from left to right
decreasing atomic mass number from left to right
An ice cube is put into a heated pan. What will most likely happen to the molecules in the ice as the ice is heated?
The molecules will begin to move slower.
The molecules will begin to move faster.
The molecules will begin to increase in density.
The molecules will begin to condense in the air.
Which best explains why the total mass of the product(s) might be less than the total weight of the reactant(s) after a chemical reaction?
A physical change occurred.
Atoms involved in the reaction lost mass.
Precipitates were created in the new solution.
Gases were released to the atmosphere.
Which pair of elements has the most similar properties?
Li and B
I and Ca
K and He
N and P
If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products?
12 atoms of carbon (C)
6 atoms of carbon (C)
3 atoms of carbon (C)
2 atoms of carbon (C)
How does a balanced chemical equation satisfy the Law of Conservation of Mass?
During a chemical reaction, the total amount of matter stays the same.
During a chemical reaction, matter is destroyed.
During a chemical reaction, one or more new substances are formed.
During a chemical reaction, the total number of atoms increases.
Which is a compound?
sodium
sugar
nitrogen
air
Two different liquids are poured together in an open container. Bubbles begin to form. After the bubbling stops, it is determined that the total weight of the two liquids is less than before they were poured together. Which best describes this observation?
Some of the atoms during the reaction escaped into the air.
Some of the atoms during the reaction were destroyed.
Some of the atoms during the reaction became heavier.
Some of the atoms during the reaction changed to a different kind of atom.
Which is the best example of a pure substance?
peanuts
milk
gold
air
The chemical formula for baking soda is NaHCO3. How many different elements make up baking soda?
1
2
3
4
Properties such as magnetism, luster, and malleability have been used to group together which category of elements on the periodic table?
metals
nonmetals
metaloids
noble gases
Which is a balanced chemical equation according to the law of conservation of mass?
CH4 + O2 ---> CO2 + 2H2O
CH4 +2O2 ----> CO2 + 2H2O
2CH4 + O2 ----> CO2 + 2H2O
The compound potassium sulfate, K2SO4, is composed of
2 atoms of potassium, 1 atom of sulfur, and 4 atoms of oxygen.
2 atoms of potassium, 4 atoms of sulfur, and 4 atoms of oxygen.
two molecules of potassium and one molecule of sulfate.
one molecule of potassium and two molecules of sulfate.
Which of the following is evidence that a chemical change has occurred?
melting
boiling
bubbling/fizzing
change of size
How many groups does the periodic table contain?
2
3
18
32
In this diagram, what does the number 12 represent?
Atomic Mass
A number of electrons
A chemical symbol
Valence Electrons
This is a type of mixture where one substance dissolves into another
Solution
Miscibility
Compound
Solubility
Why do animals need carbohydrates in their diet?
to build muscles
for insulation of internal organs
to carry water molecules
to be used for energy
Elements with similar chemical and physical properties are found ______________.
in the same period
in the same group
have the same atomic mass
Reactants X and Y come together to form a product with a mass of 200 grams. The mass of x is 150 grams. What is the mass of Y?
50 grams
200 grams
10 grams
150 grams
After a person eats, the food is converted into energy by
muscles.
tissues.
bones.
cells.
When iron combines with oxygen in a moist environment, rust forms because of a
chemical reaction.
physical reaction.
change in density.
change in temperature.
Which subatomic particles determine the reactivity of groups of elements in the periodic table?
electrons
neutrons
protons
In which organelle does cellular respiration take place?
nucleus
chloroplast
chlorophyll
mitochondria
What is the source of energy used in photosynthesis?
glucose
chlorophyll
sunlight
DNA
In which cell organelle photosynthesis takes place
Chloroplast
Mitochondria
Ribosomes
Lysosomes
What gas do plants release?
Nitrogen
Oxygen
Carbon monoxide
Helium
What are the 3 reactants of photosynthesis? The reactants are the things needed for photosynthesis to occur.
oxygen, glucose, sunlight
sunlight, oxygen, water
water, oxygen, carbon dioxide
carbon dioxide, sunlight, water
sucralose
glucase
The original source of energy for all life comes from ____.
soil
food
Which of the following foods is NOT a source of protein?
Fast energy such as candy and fruit
Complex carbohydrates
Saturated fats
Trans fats
Simple carbohydrates
A substance you need to grow and live is called a
Balanced diet
Nutrient
Calorie
Myplate
Which is the best estimate of the melting point of Rubidium (Rb)?
25* C
40* C
75* C
184* C
A student places a piece of magnesium metal in a test tube containing acid. The student records four observations during the experiment.
Which observation describes a chemical change?
A. #1
B. #2
C. #3
D. #4
The chemical equation represents the process of photosynthesis.
Which element in the reaction is unbalanced?
A. carbon
B. hydrogen
C. oxygen
D. sunlight
Which is the best example of a pure substance?
peanuts
milk
gold
air
An ice cube is put into a heated pan. What will most likely happen to the molecules in the ice as the ice is heated?
The molecules will begin to move slower.
The molecules will begin to move faster.
The molecules will begin to increase in density.
The molecules will begin to condense in the air.
Why is a healthy diet important?
It maintains a constant body temperature.
It prevents damage to internal organs.
It makes oxygen for all the cells in the body.
It supplies the body’s needs for growth and energy.
How would smoking tobacco most likely have a negative impact on the ability of an individual to succeed at physical activities? .
It interferes with balance and coordination.
It decreases the ability to make decisions rapidly.
It decreases stamina and cardiovascular efficiency.
It decreases the speed and power of muscle contractions.
