Chemical and physical changes
Electricity and Magnetism
constructive and destructive forces
cells and microorganisms
inherited traits and classification
100
What are physical changes and chemical change?
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100
What is static electricity? What is human-harnessed electricity?
Static electricity is when electric charge builds up on something, like when you rub a balloon on your hair. Human-harnessed electricity is the kind we use in homes and buildings, coming from power plants and wires.
100
What's a constructive and destructive force
A constructive is a process that build up or constructs and a destructive process is a process that breaks down or destroys.
100
What is a microorganism?
A microorganism is a tiny living organism that can only be seen under a microscope. Examples include bacteria, fungi, protozoa, and viruses.
100
What is an inherited trait? What is an acquired trait.
An inherited trait is a physical characteristic passed down from parents to their offspring through genes.
Example: Eye color, hair type, dimples
200
What happens when salt dissolves in water? Does this change its chemical composition?
Salt dissolves in water by breaking into smaller particles (ions) that spread throughout the liquid.
No, the chemical composition of salt (NaCl) does not change; it is still salt, just mixed into the water.
200
How do people use static electricity in real life? How do people use human-harnessed electricity?
Static electricity is used in printers and air purifiers. People use human-harnessed electricity to power homes, businesses, and technology like computers and phones.
200
What land from is created by using a constructive by wind, water, or ice wearing down rocks?
Weathering
200
Compare beneficial and harmful microorganisms
Beneficial microorganisms help with processes like digestion, food production, and decomposition. Harmful microorganisms can cause diseases and spoil food. For example, E. coli can be harmful, while Lactobacillus is beneficial.
200
Why is it important to understand the difference between inherited and acquired traits when learning about how living things grow and change?
Understanding the difference helps us know what traits we’re born with and what traits can change over time. This is important in science and health—like knowing if a disease runs in a family (inherited) or came from a person’s lifestyle (acquired). It also helps us see how organisms adapt to their environments.
300
Compare and contrast mixing sand with water versus mixing salt with water. How do their physical changes differ?
When sand is mixed with water, it does not dissolve; instead, it settles at the bottom. This is a suspension.When salt is mixed with water, it dissolves completely, forming a solution.
300
You tested a metal spoon and a wooden spoon in a circuit. The light bulb turned on with the metal spoon but not the wooden one. Why?
The metal spoon is a conductor, so it lets electricity flow. The wooden spoon is an insulator, so it stops electricity.
300
How can volcanic eruption be both destructive and constructive
It can be destructive by forming new land forms but can also be destructive by destructing ecosystems.
300
What is the function of the cell membrane?
The cell membrane controls what enters and exits the cell. It acts like a sheild
gatekeeper.
300
Why is it helpful for scientists to sort animals into groups like vertebrates and invertebrates?
Sorting animals helps scientists organize information and understand how animals are alike and different.
It also helps us study animals’ body structures, behaviors, and how they survive.
400
If you freeze water into ice and then melt it back into water, how do the properties of the substance change or stay the same?
The state of matter changes (solid to liquid and back), but the chemical composition of H₂O remains the same.
400
Design a simple investigation to test the strength of an electromagnet versus a permanent magnet.
One experiment could involve creating an electromagnet by wrapping wire around an iron nail and connecting it to a battery. A permanent magnet and the electromagnet could then be used to pick up paper clips. The number of paper clips lifted would indicate the relative strength of each magnet.
400
How does erosion differ from weathering?
Weathering breaks down rock into smaller pieces while erosion moves pieces to a another place.
400
Compare beneficial and harmful microorganisms.
Beneficial microorganisms help with processes like digestion, food production, and decomposition. Harmful microorganisms can cause diseases and spoil food. For example, E. coli can be harmful, while Lactobacillus is beneficial.
400
How is an inherited trait different from an acquired trait? Can you give an example of each?
Inherited traits come from your parents and are present at birth. Acquired traits are gained after birth through experience or environment.
Inherited trait: Naturally curly hair
Acquired trait: A pierced ear
500
How can filtration and evaporation be used to separate a mixture of salt and water?
Filtration can not separate dissolved salt from water.Evaporation can be used by heating the saltwater until the water evaporates, leaving the salt behind.
500
Based on evidence, why might an electromagnet be more useful in certain applications, such as a scrapyard crane?
An electromagnet can be turned on to pick up metal objects and turned off to drop them, which makes it more practical than a permanent magnet that is always attracting metal.
500
Why can a Earthquakes be considered destructive force?
Because they can break apart land damage building, and change the earth's surface.
500
Using at least two pieces of scientific evidence, construct an argument that supports the claim that some microorganisms are beneficial to human health.
Many microorganisms are essential to human health. For example, gut bacteria like Bifidobacterium help digest food and produce vitamins such as B12. Studies show that probiotics can improve digestion and strengthen the immune system. Therefore, not all microorganisms are harmful; some are vital for our well-being.
500
Why is it important to understand the difference between inherited and acquired traits when learning about how living things grow and change?
Understanding the difference helps us know what traits we’re born with and what traits can change over time. This is important in science and health—like knowing if a disease runs in a family (inherited) or came from a person’s lifestyle (acquired). It also helps us see how organisms adapt to their environments.