Year 8 Flashcards
(26 cards)
What is the basic unit of life?
Cell
True or False: Plants perform photosynthesis.
True
Fill in the blank: The process by which plants make their own food is called _____.
Photosynthesis
What is the chemical formula for water?
H2O
What are the three states of matter?
Solid, liquid, gas
Which organ is responsible for pumping blood in the human body?
Heart
Multiple choice: Which of the following is a non-renewable resource? A) Wind B) Solar C) Coal D) Water
C) Coal
What is the main gas that plants take in during photosynthesis?
Carbon dioxide
True or False: Atoms are the smallest unit of matter.
True
Fill in the blank: The force that pulls objects toward the Earth is called _____.
Gravity
What is the name of the process by which water vapor turns into liquid water?
Condensation
What are the four main types of macromolecules in living organisms?
Carbohydrates, proteins, lipids, nucleic acids
Multiple choice: Which part of the plant is primarily responsible for photosynthesis? A) Roots B) Stem C) Leaves D) Flowers
C) Leaves
What is the primary function of the respiratory system?
To exchange gases (oxygen and carbon dioxide)
True or False: The nucleus is the control center of the cell.
True
Fill in the blank: The building blocks of proteins are called _____.
Amino acids
What is the term for a change in an organism’s environment that causes a response?
Stimulus
Multiple choice: Which type of energy is stored in food? A) Kinetic B) Potential C) Thermal D) Chemical
D) Chemical
What is the role of enzymes in biological reactions?
To speed up the reactions
True or False: All living things reproduce.
True
Fill in the blank: The process by which cells divide to form new cells is called _____.
Mitosis
What is the primary source of energy for the Earth?
The Sun
What is the name of the largest organ in the human body?
Skin
Multiple choice: Which of the following is a renewable resource? A) Natural gas B) Solar energy C) Nuclear energy D) Coal
B) Solar energy
