Module A - Ecology
Which of the following are reasons for preserving biodiversity?
a. Some insects spread diseases among humans
b. Many industries and jobs rely on certain species
c. Scientists seek to understand the natural world in all its complexity
d. Future generations deserve to appreciate the beauty of the natural world
b, c and d
True or False? Atoms are the smallest particles of matter.
False. Atoms are made of even smaller particles, called subatomic particles.
True or False? If the north poles of two magnets are brought close together, they will repel each other.
True
Write a hypothesis for this question: Does the amount of salt added to the top of lasagna affect the time it takes to melt the cheese?
If the amount of salt is increased, then the time it takes to melt the cheese will decrease.
Name an organ that is part of the Central Nervous System
The brain
Plants create food using energy from the sun. What is this process called?
Photosynthesis
Can you describe the structure of an atom?
A positively charged nucleus circled by widely spaced negatively charged particles
Describe 2 features a circuit must have to operate correctly.
Energy source, energy receiver, be closed
A student wanted to test the amount of time that it takes for different types of balls (e.g. basketball, tennis ball, soccer ball) to reach the ground, when dropped from a certain height.
What is the dependent variable?
Time
Identify two functions of the Nervous System.
Control actions, sense the environment
Why are producers important in an ecosystem?
They harvest energy from the sun and that energy is what moves through the ecosystem via food webs.
An atom of gold has 79 protons. Determine the atomic number of gold.
79
When light globes are connected in _____________, the same electric current flows through each globe. The globes share the voltage of the power supply.
Series
A student wanted to test how the mass of a paper plane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly.
What is the independent variable?
The number of paperclips
What is the name of the cell that transmits messages within the central nervous system?
Neuron
Monarch caterpillars only eat milkweed plants. If their food web was disrupted, they would be at greater risk than other animals. Explain why.
A change in the food web could cause the milkweed plants to decrease in number or die out. The caterpillar would then also be at risk of decreasing in number or dying out because they would have no other food source to turn to.
Complete the equation:
mass number =
number of neutrons + number of protons
Which units are used to measure resistance?
Ohms
I want to compare brands of paper towels, to see which holds the most liquid.
Describe three controlled variables.
The length of paper towel, the amount of liquid poured, the type of liquid (many answers accepted)
Hormones carry messages around the body. Which body system are they a part of?
Endocrine System
What is a microbiome AND why is it important?
A microbiome is of all the microorganisms living in and on all vertebrates, including humans.
The bacteria (mostly) in the gut microbiome aid in the digestion of food and regulate our immune system.
A lithium ion has 3 protons and 2 electrons. It forms when a neutral lithium atom loses one electron.
Is this an example of a cation or an anion?
This is a cation
What will happen to the current of a circuit if resistance is increased?
The current will decrease.
If an experiment can't be made safe, should you go ahead and do it anyway?
No!
The Skeletal System contains all of your bones! Describe two other body systems it interacts with to make your body function.
Muscular system - movement
Respiratory system - ribcage protects the lungs
Digestive system - gives it structure and support