physical/chemical change
Is an ice cube melting a physical or chemical change
It is a physical change because it is still water, just in a different state.
Any material that attracts iron
What is a magnet
A river carrying a heavy load of sand and silt reaches the ocean. As the water slows down, it can no longer carry the sediment, and the sand begins to pile up at the river's mouth, eventually forming a triangular piece of new land. What is the name of this constructive process where sediment is "dropped off" in a new location?
Deposition. This occurs when wind, water, or ice drops sediment in a new place, building up the land.
Every living thing, from a tiny ant to a giant whale, is made of these "building blocks of life." What are they?
Cells.
Scientists divide the entire animal kingdom into two main groups based on whether or not they have a backbone. What are these two groups called?
Vertebrates (with a backbone) and Invertebrates (without a backbone).
What happens to the molecules of a substance during a chemical change?
They rearrange to form a new substance.
What 3 properties do all magnets have?
1) They have a north pole and a south pole 2) They exert a force 3) They are surrounded by a magnetic field
You are visiting the beach and notice two things happening:
Plant cells have two special parts that animal cells do not. One provides a stiff, outer structure, and the other turns sunlight into food. Name them.
The Cell Wall and the Chloroplast.
Q: Which of the following is an inherited trait (passed down through DNA) rather than a learned behavior: Having a scar, knowing how to ride a bike, or having blue eyes?
A: Having blue eyes. (Scars come from the environment, and riding a bike is a learned skill).
You have a sealed glass jar containing a mixture of ice cubes, liquid water, and salt. You place the jar on a digital scale and then set it in a warm, sunny window. After one hour, all the ice has melted and the water has become very warm.Will the total mass shown on the scale be higher, lower, or exactly the same as it was at the start?
It will be exactly the same. matter cannot be created or destroyed. Even though the ice changed state, all the atoms are still inside the sealed jar.
The region around a magnet where the magnetic force can act
What is a magnetic field
A destructive process (erosion). The ocean is carrying the sand away
Inside a cell, there is an organelle that acts like a "brain" or "boss." It contains the genetic material (DNA) and tells the cell what to do. What is it called?
The Nucleus
Q: You find a warm-blooded vertebrate that has hair or fur and feeds its babies milk. Which specific class of animals does it belong to?
A: Mammals.
You place a small pile of baking soda into a balloon and stretch the opening over a flask filled with vinegar. You record the total mass of the setup on a scale. Next, you lift the balloon so the baking soda falls into the vinegar. Immediately, the liquid begins to fizz and bubble, and the balloon inflates.Name two specific "clues" from the scenario that prove a chemical change occurred rather than just a physical one.
The production of gas (the bubbles/fizzing) and the formation of a new substance (the gas that filled the balloon).
What makes something magnetic?
The domains in the object must be aligned or lined up.
The Earth’s surface isn’t one solid piece; it’s broken into giant tectonic plates. Imagine two plates meeting at a boundary.
An earthquake
Microorganisms (like bacteria) are often called "germs," but many are actually helpful. Give one example of how bacteria can be beneficial to humans.
Examples include: helping with digestion in our intestines, decomposing dead matter in nature, or being used to make foods like yogurt and cheese.
Q: A spider spinning a web and a bird migrating south for the winter are examples of behaviors animals are born knowing how to do. What is the scientific term for these "pre-programmed" behaviors?
A: Instincts (or Inherited Behaviors).
You are camping and decide to make dinner. You perform two actions:
Action A (Burning Logs) is a chemical change (combustion). Action B (Boiling Water) is a physical change (change of state).
Explain the 3 steps of how an electric generator works
1) A crank is turned rotating the wire coil through the magnetic field 2) This creates an electric current in one direction. 3) As the coil continues to rotate, the electric current continues in the opposite direction
Deep under the ocean, a "hot spot" in the Earth's mantle forces liquid rock up through a crack in the tectonic plate.
Underground it is magma; once it hits the surface, it is lava
You are looking at an organism under a microscope. It is made of only one single cell, and it can move on its own to find food.
You discover a new animal! It spends the first part of its life breathing through gills in the water, but then it develops lungs and legs to live on land as an adult.