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Basic Chemistry

Total questions: 48

Worksheet time: 28mins

Name
Class
Date
1.

Daniel and Harper are playing a science game! Can you help them finish this sentence? Matter is anything that _______ space and has mass.

a)

destroys

b)

ignores

c)

occupies

d)

creates

2.

James, Arjun, and Priya are curious in science class! Can you help them fill in the blank: Energy is the ability to do _______.

a)

rest

b)

sleep

c)

eat

d)

work

3.

William, Noah, and Lily are at the top of a roller coaster, just about to zoom down! The energy they have at the very top is called ________ energy.

a)

stored

b)

moving

c)

lost

d)

thermal

4.

Luna and Evelyn are in a science quiz! They need your help: ATP releases energy by removing a ________ group. Can you help them choose the right answer?

a)

hydroxyl

b)

phosphate

c)

methyl

d)

carboxyl

5.

Mia and Oliver are racing their bikes down a hill. Which type of energy are they showing off as they zoom past Michael?

a)

Energy of position

b)

Energy of motion

c)

Energy of sound

d)

Energy of light

6.

Michael, Ethan, and Aiden are on a science adventure! They discover different types of energy. Which one is an example of chemical energy?

a)

ATP

b)

Sunlight

c)

Sound waves

d)

Gravity

7.

Aria and Benjamin are building a robot that can move its arms and legs. Which type of energy is associated with the movement of its parts?

a)

Mechanical

b)

Radiant

c)

Chemical

d)

Electrical

8.

Abigail and Henry are exploring how we see the world around us. They discover that light, which is necessary for vision, is an example of which type of energy?

a)

Radiant energy

b)

Chemical energy

c)

Mechanical energy

d)

Nuclear energy

9.

During gym class, Harper and Charlotte notice their muscles getting warm as they exercise. The heat created by their muscles during contraction is an example of which type of energy?

a)

Thermal energy

b)

Kinetic energy

c)

Chemical energy

d)

Electrical energy

10.

Sophia, Avery, and Mia are curious about how our bodies turn food into tiny elements that can pass through the cell membrane. What is this amazing process called?

a)

Digestion

b)

Respiration

c)

Photosynthesis

d)

Excretion

11.

Isla, Aria, and Maya are curious about how their bodies send quick messages. Which system uses the movement of ions across membranes to conduct an impulse, helping them react in a flash?

a)

Nervous System

b)

Digestive System

c)

Respiratory System

d)

Circulatory System

12.

Olivia and Aiden are curious about what makes up most of our bodies! 96% of the human body is made from just four elements. Which of the following is NOT one of those elements?

a)

Carbon (C)

b)

Oxygen (O)

c)

Hydrogen (H)

d)

Nitrogen (N)

e)

Calcium (Ca)

13.

Mia, Arjun, and Luna are on a science adventure! They discover a mysterious element. What is the atomic number equal to?

a)

The sum of protons and neutrons

b)

The number of protons that the atoms contain

c)

The atomic weight

d)

The element symbol

14.

Maya and Abigail are having a science quiz! Maya asks, "Hey Abigail, do you know what the atomic mass number is?" Can you help Abigail choose the correct answer?

a)

The number of protons

b)

The sum of the protons and neutrons

c)

The atomic weight

d)

The element symbol

15.

Aria and Ava are having a friendly science quiz. Scarlett asks them: "Can you tell me what the atomic number of Boron is?" Help them out!

a)

5

b)

10.811

16.

David, Jackson, and Daniel are exploring the periodic table, and they come across the element Oxygen. Can you help them figure out what the atomic weight of Oxygen is?

a)

15.999

b)

8

17.

Aria and Arjun are having a science debate! Aria says anions are negative, while Arjun thinks they’re positive. Which is correct?

a)

Negative

b)

Positive

18.

Isla and Michael are playing a science quiz! Isla asks, "Are cations positive or negative?" What should Michael answer?

a)

Positive

b)

Negative

19.

Priya and Michael are having a science debate! They want to know: Do ions donate or accept electrons?

a)

Either donate or accept electrons

b)

Only donate electrons

c)

Only accept electrons

d)

Neither donate nor accept electrons

20.

Avery, Aiden, and Samuel are on a science adventure! They discover two hydrogen atoms teaming up to form a molecule of hydrogen gas (H2). According to the diagram, what type of covalent bond do these hydrogen atoms form to become a super duo?

a)

Single covalent bond

b)

Double covalent bond

c)

Triple covalent bond

d)

Ionic bond

21.

Mia and Mason are on a science adventure! They’re looking at the diagram above and trying to figure out what type of covalent bond forms between two oxygen atoms to create a molecule of oxygen gas (O2). Can you help them solve this bonding mystery?

a)

Single covalent bond

b)

Double covalent bond

c)

Triple covalent bond

d)

Ionic bond

22.

Isla and Benjamin are having a science debate! Isla says hydrogen bonds are super strong, but Benjamin disagrees. Who is right? Hydrogen bonds are considered ______ chemical bonds.

a)

weak

b)

strong

c)

ionic

d)

covalent

23.

Luna, Emma, and Ethan are in science class, and their teacher asks: Which of the following is an example of a synthesis reaction?

a)

ATP loses a phosphate

b)

Amino acids bond to form proteins

c)

Glucose is broken down

d)

Water evaporates

24.

Grace and Zoe are in science class, and their teacher asks: A decomposition reaction is also known as a(n) ________ reaction. Can you help them choose the right answer?

a)

catabolic

b)

anabolic

c)

synthesis

d)

combination

25.

Charlotte, Benjamin, and Zoe are in science class, and their teacher asks: Which of the following is an example of a decomposition reaction?

a)

A) Amino acids bond to form proteins

b)

B) ATP loses a phosphate, releasing energy

c)

C) Water freezes

d)

D) Oxygen combines with hydrogen

26.

Ethan, Abigail, and Hannah are in science class, and they spot the protein molecule pictured above. Can you help them figure out: What molecules are joined together to build this protein?

a)

Glucose molecules

b)

Amino acids

c)

Glycogen

d)

Fatty acids

27.

Mason, Daniel, and Anika are learning about decomposition reactions in science class. When glycogen breaks down in your body, which type of molecules are released to give you energy?

a)

Protein molecules

b)

Amino acids

c)

Glucose molecules

d)

Fatty acids

28.

Arjun and Avery are having a science debate! Which of the following is a characteristic of inorganic compounds?

a)

Contain carbon

b)

Lack carbon

c)

Are complex compounds

d)

Are always organic

29.

Nora, Liam, and Michael are on a science adventure! They want to know: What is the most abundant inorganic compound in the human body?

a)

Water

b)

Sodium chloride

c)

Calcium carbonate

d)

Oxygen

30.

Rohan, Grace, and Mason are curious: What percentage of your body weight is made up of water? Take a guess!

a)

60-80%

b)

10-20%

c)

30-40%

d)

90-100%

31.

Luna and Mason are having a water balloon fight on a hot day! They notice that the water inside the balloons doesn't heat up quickly, even though it's sunny. Which property of water is responsible for this cool effect?

a)

High heat capacity

b)

Low density

c)

Strong acidity

d)

High electrical conductivity

32.

Imagine Samuel accidentally bumps his head while playing soccer. Does water in his body help protect his brain by providing a cushioning effect?

a)

True

b)

False

33.

Ava and Michael are doing a science experiment to test the pH of different liquids. They want to know: what is the pH of neutral water?

a)

7

b)

5

c)

9

d)

3

34.

Rohan and David are having a science quiz! They stumble upon this question: Enzymes are considered to be 

a)

Lipids

b)

Carbohydrates

c)

Proteins

d)

Nucleic Acids

35.

Elijah and Abigail are curious about how reactions happen in our bodies. Can you help them out? What is the purpose of an enzyme?

a)

gives permission for the reaction

b)

raises activation energy

c)

speeds up reactions

d)

controls how many reactions occur

36.

Abigail and Liam are curious about how enzymes work their magic in living cells. Enzymes are known to speed up chemical reactions, but how do they actually do it? Which of the following explains the secret behind enzymes' superpower?

a)

reducing the number of products   

b)

reducing the activation energy

c)

increasing the temperature of the cell

d)

increasing the concentration of reactants 

37.

Michael and Daniel are in the science lab, and they discover a mysterious substance that an enzyme is about to act upon. What is this substance called?

a)

Coenzyme

b)

Substrate

c)

Vitamin

d)

Polypeptide

38.

Nora and Aria are learning about enzymes in their science class. They discover that enzymes provide a special site where reactants, called substrates, can come together for an enzyme-catalyzed reaction. What is this special site called?

a)

enzyme substrate complex.

b)

reaction site.

c)

active site.

d)

lock and key.

39.

Abigail and Mason are learning about enzymes in science class. What happens to the shape of an enzyme when it is denatured?

a)

It forms a new enzyme

b)

It loses its specific shape

c)

It becomes more active

d)

It remains unchanged

40.

Mason and Isla are looking at the image of a denatured enzyme in science class. They wonder: What happens to enzyme activity when the enzyme gets denatured?

a)

Creates new active sites

b)

Decreases or stops activity

c)

No effect

d)

Increases activity

41.

  • Aiden, Daniel, and Evelyn are conducting a science experiment in class. They want to find out which things can denature enzymes and stop them from working properly. Can you help them choose the correct options?

a)

  • Heat

b)

  • pH change

c)

Cold

d)

  • Addition of ionic substances

42.

Ava and Ethan are exploring the world of sugars in their science class. They come across this colorful image showing two different units joined together. Can you help them figure out what this image depicts?

a)

polysaccharide

b)

monosaccharide

c)

disaccharide

d)

polypeptide

43.

Jackson, Anika, and Daniel are looking at this cool twisted structure in their biology class. Can you help them out by naming this type of protein?

a)

DNA

b)

RNA

c)

quaternary

d)

structural or fibrous

44.

Mia and Mason are exploring the world of RNA in science class. They discover that one base in DNA is swapped out for uracil in RNA. Can you help them figure out which base gets replaced by uracil?

a)

guanine

b)

thymine

c)

adenosine

d)

adenine

45.

Samuel and Grace are having a science quiz! Can you help them answer this: DNA & RNA are ___________ processes.

a)

copacetic

b)

contemporaneously

c)

contemporary

d)

complementary

46.

Benjamin and Aria are working together in the science lab. They discover the DNA strand shown below. Can you help them figure out which of the following DNA bases would perfectly pair with this strand?

DNA Strand

Which option is the correct complementary strand?

a)

ATCCGTAC

b)

TACCGATG

c)

CGAATGCG

d)

CGAATGCA

47.

Emma and Liam are having a snack debate! Emma says most saturated fats come from plants and are liquid at room temperature, while Liam disagrees. Who is correct? Most saturated fats come from _______, and are ________ at room temperature.

a)

plants; liquid

b)

animal fats; liquid

c)

animal fats; solid

d)

plants; solid

48.

Zoe and Nora are playing a biology quiz game! Can you help them identify which of the following are common lipids found in the body?

a)

carboxyls

b)

neutral fats (triglycerides)

c)

polysaccarides

d)

phospholipids