Cells
I am the building blocks of life. What am I?
Cells.
What does the heart pump around the body?
Blood.
A hot lightbulb gives off most heat. Is the useful or wasted energy?
Wasted.
True!
What tool do we use to look at cells?
Microscopes.
What is the key difference between unicellular and multicellular organisms? Give an example for each.
Unicellular - contains one cell (e.g. bacteria, yeast, amoeba).
Multicellular - made up of multiple cells (e.g. any living organism).
Which organ breaks down food in the digestive system?
Stomach.
What does energy efficient mean?
Using less energy for the same useful output, minimal wasted energy
What is a hypothesis?
A prediction about the results of your investigation.
What state of matter is steam?
Gas.
Which organelle is the powerhouse of the cell?
Mitochondria.
What gas do we breathe in and what gas do we breathe out?
Breathe in - oxygen
Breate out - carbon dioxide
Name one way to save energy at home.
Install solar panels, turn off lights, use LED bulbs, higher star rating appliances, etc.
What are the three types of variables?
Independent, dependent and control.
What is the freezing point and boiling point of water?
Freezing point - 0o
Boiling point - 100o
What is the difference between a cell wall and cell membrane?
Cell wall - provides structure and protection (only present in plants).
Cell membrane - controls what enters and leaves the cell.
Blood carries oxygen from lungs to cells.
Name two materials you could use to make a home more energy efficient.
Fibreglass for insulation, concrete foundations, etc.
I want to investigate whether the amount of food that I eat affects how tired I feel. What is my independent and dependent variable?
Independent variable - Amount of food eaten
Dependent variable - How tired I feel
What does qualitative data mean?
Data based on descriptions/observations, not numerical data.
Name one of the rules of cell theory.
1. All living things are made up of one or more cells.
2. Cells are the basic building blocks of life.
3. Cells come only from other cells.
Name one other thing the circulatory system delivers to cells besides oxygen.
Nutrients, hormones or water
What is the equation to calculate energy efficiency?
Energy Efficiency (%) =
Useful Output / Total Output x 100
In an investigation where I want to test if playing sport has an effect on lung capacity, what is a control variable and give an example.
Control variable - a variable that you keep constant to avoid errors.
Examples - type of sport, age range, etc.
What is the difference between an observation and an inference?
Observation - what we can see/sense
Inference - what we conclude