Flashcards in Topic One Deck (35):
Any organism which can perform the seven processes of living.
Biotic factors which interact in their quest for energy and food, among other things. They rely on each other.
What do living organisms depend on to sustain life?
What is the ultimate source of energy?
The sun is the ultimate source.
What is radiant energy?
Radiant energy is the light and heat energy that radiates from the sun.
Why are plants important to animals?
Animals cannot absorb radiant energy directly from the sun. They rely on plants to transform this energy into a form that they can use.
How do plants absorb carbon dioxide?
Their leaves absorb carbon dioxide from the gases in the atmosphere.
How do plants absorb radiant energy?
A special chemical in their cells, a pigment called chlorophyll absorbs radiant energy from the sun.
How do plants absorb the water in soil?
They use their roots to absorb the water.
What is photosynthesis?
It is the process by which green plants transform radiant energy, water and carbon dioxide into Glucose using a chemical called chlorophyll, which is also the green pigment in these plants.
What is the word equation for photosynthesis?
Carbon Dioxide+water➡️➡️➡️➡️➡️ Oxygen+glucose
What is needed for plants to perform the process of photosynthesis?
Carbon dioxide, water, and sunlight is needed.
What is starch?
Starch is the compound formed by plants from glucose molecules. It is used to store potential energy to be used to perform the seven processes of life. Other animals that eat the plants gain this stored energy.
What is cellulose?
Cellulose is the compound formed by green plants from glucose molecules. It is used to give the plant's cell walls structure.
What is a variable?
Variables are any factors that influence a scientific investigation.
What are some examples of variables?
Mass, temperature, time, volume and light are variables.
What is an independent variable?
It is the variable that the scientist chooses to change.
What is a dependant variable?
The dependant variable is the variable that will change depending on the independent variable. It is the variable to be measured in an experiment.
What are controlled variables?
They are the variables in an experiment that are needed to be kept the same for the experiment to be a fair one.
What compounds are created from the simple sugar glucose?
Starch and cellulose are created.
What is a fair test?
A fair test is a scientific investigation wherein all the variables are controlled.
What is a practical investigation?
It is an investigation that aims to determine something
How do you carry out a practical investigation?
Observe the world and ask questions
Write a hypothesis
Plan your investigation
Conduct your investigation and record your findings
Analyse your results and write a conclusion
Evaluate your investigation
What is a hypothesis?
It is a statement that gives a possible explanation to the question that you are investigating. It is a prediction of what you think will happen.
How can energy be released from food?
It can be released by a series of chemical reactions.
What is respiration?
Respiration is the process by which all living organisms release energy.
Where does respiration occur?
All living organisms perform the process of respiration.
What happens during respiration?
Plants and animals break down glucose and oxygen to produce carbon dioxide, water and energy. They release these substances back into the atmosphere.
What is the word equation for respiration?
What are the reactants of a chemical reaction?
They are the things that are needed to perform a process.
What are the products of a chemical reaction?
These are the things that are created or released during the chemical reaction.