What are some good science fair projects for 4th graders?

What are some good science fair projects for 4th graders?

35 Exciting Hands-On Fourth Grade Science Experiments, Activities, and Projects

• Blow unpoppable bubbles.
• Grow crystal names.
• Engineer a drinking straw roller coaster.
• Make a wigglebot.
• Grow bacteria in petri dishes.
• See coastal erosion in action.
• Construct a working flashlight.
• Erupt a lemon volcano.

How do you make a science fair project for kids?

Science Experiments for Kids:

1. Lava Lamp: Use Density to Build a Funky Lamp.
2. Orange Fizz: Chemical Eruption in your Mouth.
3. Storm in a Glass: Model of Rainstorm in a Glass.
4. Dry Erase: Draw Figures that become Animated.
5. Making A Volcano: Acids and Bases Can Erupt in Your Faces.
6. Home Made Play Dough:
7. Snow Fluff:
8. Milk Art:

What is milk art?

Milk has fat in it and the food coloring floats on top of the fat. The fat is all connected with bonds. Think of it like the little pieces of fat all holding hands with each other. When you add the dish soap to the milk, the fat separates and moves making your magical milk art!

How do you make a Snowfluff?

Snow Fluff Materials: 1 cup cornflour 1 cup shaving cream Food Coloring Instructions: Pour the cup of corn starch into a large bowl. Use a spoon to scoop the shaving cream on top of it. Put 5-10 drops of food coloring on top. Stir to mix.

Can you do a science experiment at home?

Here are a few easy ways for you to see science in action.

• Tornado in a bottle. via GIPHY. You can create your own tornado in a bottle.
• Rainbow in a glass. via GIPHY.
• Gooey slime. via GIPHY.
• Pasta rocket. via GIPHY.
• Homemade lava lamp. via GIPHY.
• Instant ice. via GIPHY.
• Ferromagnetic fluid. via GIPHY.
• Baking soda volcano. via GIPHY.

How do you do the milk experiment?

Instructions

1. Pour some milk into a shallow dish or bowl until the milk covers the bottom. Tip: Be sure to use either Whole or 2% Milk.
2. Add some drops of food coloring on the milk.
3. Add a drop of dish soap into the center of the milk.
4. Watch in amazement as the colors dances across the surface of the milk.

Why does dish soap make milk swirl?

When liquid dish soap is added to milk with drops of food coloring on the surface, the soap reduces the surface tension of the milk and reacts with the fat. This interaction causes the fat particles in the milk to move and create swirls of color.

Can I add food coloring to milk?

1. Carefully pour some milk in a dish so it just covers the bottom. 2. Gently add one or two drops of red, blue, and yellow food coloring to the same spot in the center of the milk.

Can we add food Colour in milk?

Add one drop of each of the four colors of food coloring — red, yellow, blue, and green — to the milk. Keep the drops close together in the center of the plate of milk. Place the soapy end of the cotton swab back in the middle of the milk and hold it there for 10 to 15 seconds. Look at that burst of color!

Is it safe to drink food coloring?

More Research is Needed Artificial food dye consumption is on the rise, especially among children. Consuming too much food dye containing contaminants could pose a health risk. However, with the exception of Red 3, there is currently no convincing evidence that artificial food dyes cause cancer.

How does soap break up fat?

Generally speaking, soaps remove dirt and fats by making them soluble in water. The fats are attracted to the non-polar tail part of the soap while the polar head makes the whole complex (soap + fat molecules) dissolve in water.

Why does pepper move away from dish soap in water?

Soaps and cleaners are designed to break down the surface tension of water. The water molecules, however, want to stick together and maintain that tension, so they move away from the soap, carrying the pepper with them!

Why does dish soap break surface tension?

Detergent and Soap Break Surface Tension The end of the detergent molecule which attaches to fat (grease) repels water molecules. This weakens the hydrogen bonds holding the water molecules together at the surface. The result is a break in the surface tension of the water.

Why does pepper sink in alcohol?

The surface tension of the water is high due to hydrogen bonding. The bits of pepper are small enough to be suspended on the surface of the water. However, the surface tension of isopropanol is much lower than that of water, allowing the pepper to sink to the bottom of the well.

Why does dish soap reduce surface tension?

Soap molecules are composed of long chains of carbon and hydrogen atoms. This separates the water molecules from each other. Since the surface tension forces become smaller as the distance between water molecules increases, the intervening soap molecules decrease the surface tension.

Should you dilute dish soap?

But is this soap as effective as the concentrated stuff? Dawn dish soap’s official stance is no. “We do not recommend diluting your bottle of soap.

Does salt increase surface tension?

The surface tension does increase when the salt is added to the water so that means that the penny drop experiment is mostly affected by the water’s cohesive forces.

How can you increase the surface tension of water?

Compounds that lower water’s surface tension are called surfactants, which work by separating the water molecules from one another. Adding salt to water does increase the surface tension of water, although not by any significant amount. …

What liquid has the lowest surface tension?

Hexane

How do you break the surface tension of water?

Surfactants may act as detergents, wetting agents, emulsifiers, foaming agents, and dispersants. If there is any oil or oily compounds on the free surface of the water, then surface tension will be reduced. If you mix something to the water, then the surface tension will be changed.

Does throwing rocks break surface tension?

Nope. The whole ‘breaking the surface tension’ is a myth. You would splat no matter how many bullets you had. Unless you have a grenade launcher capable of creating vast amounts of gas bubbles in water under you.