What should I do for my 9th grade science fair?

Science Fair Projects for 9th Grade

Pressure Bottle Rocket. (Ages 9-16)
Flying Teabag. (Ages 7-16)
Flaming Torch. (Ages 9-16)
Electromagnet. Give this experiment a try, and see how many paper clips you can pick up with your electromagnet!
Rubber Band Racer. (Ages 5-16)

What are some good science fair questions?

These are examples of good science fair project questions:

How does water purity affect surface tension?
When is the best time to plant soy beans?
Which material is the best insulator?
How does arch curvature affect load carrying strength?
How do different foundations stand up to earthquakes?
What sugars do yeast use?

What do 10th graders learn in science?

Common 10th-grade science courses include biology, physics, or chemistry. Most students complete chemistry after successfully completing Algebra II. Interest-led science courses may include astronomy, marine biology, zoology, geology, or anatomy and physiology.

How do you make invisible writing with lemon juice?

Instructions:

Squeeze some lemon juice into the bowl and add a few drops of water.
Mix the water and lemon juice with the spoon.
Dip the cotton bud into the mixture and write a message onto the white paper.
Wait for the juice to dry so it becomes completely invisible.

What is a topic in science fair?

Typically, elementary school and middle students’ science fair topic ideas fall into one of seven main categories: biology, chemistry, earth science, electronics, astronomy, engineering, and physics.

Can you burn tea?

Why not boiling water? Because tea leaves, even dried leaves, can burn! Black teas are least prone to burning as they have been heat-treated in processing, but they can still burn and produce a very bitter taste.

Why do teabags float?

Adding the teabag into the hot water will often result in a sinking bag, while adding the teabag first and poring hot water over it often results in a floating bag because air bubbles form in the bag.