Magnetic Rules
Magnets ALWAYS repel when like poles are next to each other.
TRUE OR FALSE
TRUE
Which poles of two magnets will repel each other?
North and North OR South and South (like poles)
What is used to represent the invisible magnetic field around a magnet?
Magnetic field lines
What are the two magnetic forces?
attracting force and repelling force
What is the capital of CA?
Sacramento
Magnets SOMETIMES move other magnets
TRUE OR FALSE
FALSE; always move other magnets
If a north pole of Magnet A is brought near the south pole of Magnet B, will the magnets attract or repel? Explain in one sentence
attract
True or False: Magnetic field lines are physical strands you can touch in space. Briefly justify your answer.
FALSE, explanations vary
What is the difference between attracting force and repelling force?
pull vs push
What is the largest-toothed mammal?
sperm whale
Magnets repel wood
TRUE OR FALSE
FALSE; THEY NEVER MOVE WOOD
What term describes the interaction that causes magnets to pull together or push apart without touching?
Magnetic Force
How can a visual model of magnetic field lines help scientists predict magnet motion?
They show direction and relative strength, so you can predict attraction/repulsion and motion
What is a magnetic field?
the space around a magnet in which magnetic forces can act on objects
About how many pounds of bugs does the average human accidentally eat each year?
5 pounds
U.S Nickels are attracted to magnets
TRUE OR FALSE
FALSE, THEY ONLY HAVE ABOUT 25% NICKEL
Describe how the strength of the magnetic force between two magnets changes as they move farther apart. (One to two sentences.)
The force decreases as distance increases
Draw or describe the general shape of field lines around a single bar magnet from north to south.
varies
What are magnetic field lines?
the space around a magnet in which magnetic forces can act on objects
Which animal can lift up to 50 times its body weight?
Ant
TRUE OR FALSE
FALSE, they can sometimes attract and sometimes repel
Two bar magnets are identical. Describe one experimental change (independent variable) you could make to test how the magnetic force between them changes, and name one thing you must keep the same (controlled variable).
Example
independent variable: distance between magnets; controlled variable: type/size/orientation of magnets
How would field lines differ when a north pole is near a south pole (attracting) versus north near north (repelling)? Provide two distinct differences.
varies
In science, what is a variable?
something that can be changed and may be measured
What is the heaviest bone in the body
femur (thigh bone)