chemical and physical change
Electricity and Magnetism
constructive and destructive forces
Cells and Microorganisms
inherited and acquired traits
100
What is a physical change?
A change in the form of a substance without changing its chemical composition.
100
What is a magnetic field?
A magnetic field is a physical field that describes the magnetic influence on moving electric charges
100
What is a constructive force?
A constructive force builds up the Earth's surface, forming new landforms.
100
What is the smallest unit of life called?
cell
100
What does it mean for a trait to be inherited?
it mean it's passed down from parents to offspring through genes, which are made of DNA.
200
Which of the following is an example of a physical change?
- A) Melting ice
- B) Burning wood
- C) Rusting iron
- D) Baking bread
Melting ice
200
what is wrong with the circuit
the wire is not connect to the light bulb
200
"How are constructive forces and destructive forces different
Constructive forces build up the Earth's surface by adding material, while destructive forces break it down.
200
What is the function of the nucleus in a cell?
the nucleus function is storing and protecting the cell's genetic material (DNA)
200
hair is not a inherit trait
True or false
false
300
if You pour water into a container of salt. Describe what you observe and identify the type of change that occurs.
salt particles appearing to disappear, or dissolve, as the water mixes with them
300
Explain how a changing magnetic field can produce an electric current.
A changing magnetic field can produce an electric current through a process called electromagnetic induction.
300
How can constructive and destructive forces work together to create new landforms and alter existing ones?
. Constructive forces, like volcanic eruptions and tectonic uplift, build up land. Destructive forces, such as weathering and erosion, wear down land, often breaking down landforms created by constructive forces.
300
Compare and contrast the roles of the nucleus, cell membrane, and cytoplasm in a cell. How do these structures work together to maintain the cell's life processes?
trough a coordinated system of gene expression, structural support, and metabolic activity.
300
Why do different cats have different meows?
due to a combination of factors, including individual anatomy, breed, and the situation they are in
400
You notice that a piece of metal left outside in the rain is now covered in rust. Is this a chemical or physical change? Explain
chemical change. It occurs because the metal reacts with oxygen and water, forming a new substance called iron oxide.
400
Explain the difference between static electricity and current electricity,
Static electricity refers to a buildup of stationary electric charge, while current electricity is the flow of electric charge through a conductor
400
How can the same natural event (like a river) be both a constructive and destructive force?
due to its dual role in both eroding land and depositing new sediments
400
Imagine you're a scientist examining a plant cell and a bacteria cell under a microscope. How are these two types of cells different in terms of their structures and functions, and how do their differences relate to the different roles they play in the living world?
Plant cells are eukaryotic, possessing membrane-bound organelles like a nucleus and chloroplasts, while bacteria are prokaryotic, lacking these structures and having a simpler, circular DNA structure.
400
Imagine two puppies, one has inherited a long tail and the other has a short tail. The puppies' owners then start training them to fetch. One puppy learns to jump high to catch the ball, while the other learns to roll over to get the ball. Explain how both the inherited traits (tail length) and acquired traits (training) affect the puppies' behavior and how they interact to influence the puppies' abilities and adaptations.
In this scenario, the puppies' behaviors are influenced by both their inherited tail length and the learned behaviors from training. The long-tailed puppy might be more inclined to use its tail for balance when jumping, while the short-tailed puppy might have an easier time maneuvering for a roll-over. Training further shapes their abilities, with one puppy potentially developing a natural talent for jumping and the other for rolling, based on their initial physical attributes and learned behaviors.
500
Explain the difference between a physical change and a chemical change using the example of baking a cake
a physical change is the alteration of the cake batter's appearance, like its shape or texture (e.g., from a liquid batter to a solid cake) without changing its chemical composition. A chemical change involves the creation of new substances with new properties, such as the release of carbon dioxide gas from baking powder reacting with an acid, causing the cake to rise.
500
Imagine you rub a balloon on your hair. What happens? How does this relate to the flow of electricity in a circuit?
creates static electricity, where electrons transfer from your hair to the balloon, making the balloon negatively charged and your hair positively charged.
500
Imagine you are an expert in land formation. How would you explain to a group of children how a river delta is formed, using the concept of constructive forces?
River deltas form through a complex and dynamic process involving the interaction of rivers, sediment, and the forces of waves, tides, and ocean currents.
500
Imagine you're comparing a plant cell and an animal cell. What are two key differences in their structures, and how might these differences help them perform their unique functions?
the cell wall provides support and structure in plants, while chloroplasts enable photosynthesis.
500
Explain the difference between an inherited trait and an acquired trait, providing examples of each for both animals and plants.
Inherited traits are characteristics passed down from parents to offspring through genes, while acquired traits develop during an organism's lifetime due to environmental factors or experiences.