chemical and physical changes
Electricity and Magnetism
Cells and Microorganisms
Dynamics and Classification
Earth and Changes over Times
100
What type of change occurs when water freezes into ice?
what is physical
100
What is the flow of electric charge called?
what is Electric current
100
What is the basic unit of life in all living organisms?
what is cell.
100
What is the process by which rocks are broken down into smaller pieces by natural forces?
what is weathering
200
Which of the following is an example of a chemical change?
what is Burning Wood
200
Which material is commonly used to make electrical wires because it conducts electricity well?
what is copper
200
Which organelle is known as the powerhouse of the cell?
what is Mitochondria.
200
Which class of animals includes birds that lay eggs and have feathers?
what is Aves
200
Which layer of the Earth is made up of solid rock and is the outermost layer?
what is crust
300
What is a key difference between a chemical change and a physical change?
What is A chemical change creates new substances, while a physical change does not.
300
What happens when like poles of two magnets are brought close to each other?
What is repel each other
300
What is the function of the cell membrane?
What is to control what enters and exits the cell.
300
What is the name of the supercontinent that existed about 300 million years ago?
what is pangaea
400
Which of the following is NOT a sign of a chemical change?
What is Change in state (e.g., solid to liquid)
400
What is the main difference between a permanent magnet and an electromagnet?
what is A permanent magnet always has a magnetic field, while an electromagnet only generates a magnetic field when an electric current flows through it.
400
Which type of microorganism is responsible for causing diseases like the flu and chickenpox?
what is viruses.
400
Which of the following is a characteristic of mammals?
what is they have fur or hair
400
What is the process by which sediments are pressed together to form sedimentary rock?
what is compaction
500
What is the main difference between a physical change and a chemical change?
what is Chemges changes create new substances, while physical changes do not
500
What is the force experienced by a charged particle moving in a magnetic field called?
What is magnetic force
500
What is the main difference between prokaryotic and eukaryotic cells?
what is eukaryotic have a nucleus, while prokaryotic cells do not.
500
What is the main difference between vertebrates and invertebrates?
what is Vertebrates have a backbone, while inVertebrate do not
500
Which type of rock is formed from cooled and solidified magma or lava?
what is igneous rock