Science Flashcards
What is the basic unit of life?
Cell
True or False: All living organisms are made up of cells.
True
Fill in the blank: The process by which plants make their own food is called __________.
Photosynthesis
What are the three states of matter?
Solid, liquid, gas
Which part of the cell contains genetic material?
Nucleus
True or False: The mitochondria is known as the powerhouse of the cell.
True
Fill in the blank: The Earth’s crust is made up of __________.
Tectonic plates
What is the primary gas that plants take in during photosynthesis?
Carbon dioxide
True or False: The heart is a muscle.
True
What type of blood vessel carries blood away from the heart?
Arteries
What is the role of the small intestine?
Nutrient absorption
Multiple choice: Which organ is responsible for detoxifying chemicals in the body? A) Heart B) Liver C) Lungs D) Kidneys
B) Liver
What is the function of the large intestine?
Water absorption and waste elimination
What is the main function of the skeletal system?
Support and protection of internal organs
What is the main difference between plant and animal cells?
Plant cells have a cell wall and chloroplasts; animal cells do not.
Multiple choice: Which of the following is a renewable resource? A) Coal B) Oil C) Solar energy D) Natural gas
C) Solar energy
What is au on element table
Gold
True or False: Water is a compound.
True
What is the chemical symbol for gold?
Au
Fill in the blank: The pH scale measures how __________ a substance is.
Acidic or basic
What is the main purpose of a scientific experiment?
To test a hypothesis
Multiple choice: Which of the following is a characteristic of living things? A) Growth B) Movement C) Respiration D) All of the above
D) All of the above
What is the term for the variable that is changed in an experiment?
Independent variable
True or False: The dependent variable is the one that is measured in an experiment.
True
Fill in the blank: __________ is the process by which water vapor turns into liquid water.
Condensation
What is the main source of energy for the Earth?
The Sun
Multiple choice: Which of the following is not a greenhouse gas? A) Carbon dioxide B) Methane C) Oxygen D) Nitrous oxide
C) Oxygen
What is the main function of the respiratory system?
To facilitate gas exchange
True or False: The diaphragm is a muscle that helps in breathing.
True
Fill in the blank: __________ are the building blocks of proteins.
Amino acids
What is the function of enzymes in biological systems?
To speed up chemical reactions
Multiple choice: Which of the following processes occurs in the mitochondria? A) Photosynthesis B) Respiration C) Digestion D) Excretion
B) Respiration
What is the process by which a liquid changes into a gas called?
Evaporation
True or False: An ecosystem consists of living and non-living components.
True
Fill in the blank: __________ is the study of interactions between organisms and their environment.
Ecology
What is the term for the maximum population size that an environment can sustain?
Carrying capacity
Multiple choice: Which of the following is a decomposer? A) Grass B) Mushroom C) Rabbit D) Eagle
B) Mushroom
What is the primary source of energy for most ecosystems?
The Sun
True or False: Biodiversity refers to the variety of life in an ecosystem.
True
Fill in the blank: __________ is the process by which nitrogen is converted into a usable form for plants.
Nitrogen fixation
What is the difference between a food chain and a food web?
A food chain is a linear sequence of organisms, while a food web is a complex network of interconnected food chains.
Multiple choice: Which layer of the Earth is liquid? A) Crust B) Mantle C) Outer core D) Inner core
C) Outer core
What is the primary function of the integumentary system?
To protect the body
True or False: The skin is the largest organ of the body.
True
Fill in the blank: The __________ system regulates body functions through hormones.
Endocrine
What is the function of the immune system?
To protect the body against pathogens
Multiple choice: Which cell type is responsible for carrying oxygen in the blood? A) White blood cells B) Platelets C) Red blood cells D) Plasma
C) Red blood cells
What is the term for the process by which organisms maintain a stable internal environment?
Homeostasis
True or False: All animals are heterotrophs.
True
Fill in the blank: __________ is the movement of substances across a cell membrane without the use of energy.
Passive transport
What is the role of chlorophyll in photosynthesis?
To absorb sunlight
Multiple choice: Which of the following is a product of respiration? A) Glucose B) Oxygen C) Carbon dioxide D) Water
C) Carbon dioxide
What is the primary function of the nervous system?
To transmit signals throughout the body
True or False: Neurons are the basic units of the nervous system.
True
Fill in the blank: __________ is the type of energy stored in food.
Chemical energy
What is the function of the excretory system?
To remove waste from the body
Multiple choice: Which organ is primarily responsible for filtering blood? A) Heart B) Lungs C) Kidneys D) Liver
C) Kidneys
