Fun Science Projects for 8th Grade
Fun Science Projects for 8th Grade: let’s play with science. Science is fun. Science is curiosity. We all have natural curiosity. Science is a process of investigating. It’s posing questions and coming up with a method. It’s delving in. – Sally Ride
Let’s delve in. In Fun Science Projects for 8th Grade, we are going to see an intriguing experiment on chemistry, which will educate you about Carbon dioxide
1. CO2 Sandwich
Get your little scientist into safety goggles and learn about carbon dioxide together in two fun ways.
Let’s get into experimental phase of Fun Science Projects for 8th Grade
- Safety glasses
- Measuring cup and spoons
- Baking soda
- Re-closable bags (quart-size zipper-lock bags and snack size zipper-lock bags)
- Toilet paper
Instructions- plastic bag variation:
- Start by putting on your safety glasses.
- Fill three quart-size zipper-lock bags with approximately 1 tablespoon of baking soda.
- Fill three snack-size zipper-lock bags with varying amounts of vinegar. For example, fill one bag with 60 mL (1/4 cup) of vinegar, the next bag with 80 mL (1/3 cup) of vinegar and the last bag with 120 mL (1/2 cup) of vinegar.
- Seal the vinegar bags and place them in the bags with the baking soda. When you seal the outside bags, make sure to remove as much of the air as possible.
- Put the bags on a table where it’s okay for things to get a little wet and messy (outside tables would be good).
- Punch the vinegar bags inside the baking soda bags to break them open and then shake the baking soda bags to make sure the substances mix.
- Make observations about how large each bag gets and how long it takes before you hear the giant POP!
Instructions – toilet paper variation:
- Tear off a square of toilet paper.
- Place 1 tablespoon of baking soda in the middle of the toilet paper square.
- Twist or fold the toilet paper around the pile of baking soda making a small packet.
- It’s best to have someone help you with the next few steps. Open the quart-size zipper-lock bag and measure 1/4 cup of vinegar into the bag. Add 1/4 cup of warm water to the bag.
- Zip the bag closed, but not all the way. You want a small opening just large enough to sneak in the wrapped up baking soda.
- Move the experiment to the sink, or better yet, outside. Remember, it’s all about teamwork. Drop the baking soda bundle into the bag and quickly seal the bag closed. Place the bag on the ground (or in the sink if you’re indoors) and get out of the way. Watch closely as the bag begins to puff up until the sandwich bag pops.
That’s it. Hope Fun Science Projects for 8th Grade – CO2 sandwich would have fascinated you. Let’s move on to the second experiment.
2. Relationship Between the Distance and Time of a Falling Object
Freefall occurs where the only force acting on an object is gravity. Because gravitational acceleration on earth is constant, the distance an object falls is proportional to the time spent falling. In this experiment, you will experimentally determine the acceleration due to gravity in addition to testing your own reaction time! Reaction time is the time it takes for you to react to an event: in this case, the falling of a meter stick or dollar bill. Is your reaction time faster than acceleration due to gravity?
Experimentally determine acceleration due to gravity.
Do all objects fall at the same rate? Does the weight of the object matter? What is the relationship between distance and time for free-falling objects?
- Friend, partner or helper
- Small ball
- Meter stick
- Dollar bill
- Notebook and pencil
- Have a partner hold the meter stick so the 0 side is just above your hand.
- Have the partner start the timer as soon as he or she drops the meter stick and stop the timer as soon as you catch it.
- Record the distance along the meter stick and the time.
- Do this several times for different lengths along the meter stick. What is the relationship between the time and the distance the meter stick traveled?
- Graph your results. Time will be on the x-axis, distance traveled in meters will be on the y-axis.
- Use the following equation to calculate the time it takes for the meter stick to fall. How close is your calculated time to your stopwatch value?
- Where d is the distance the object traveled, in meters
- g is the gravitational acceleration on Earth, equal to 9.81m/s2
- t is the time in seconds.
- Calculate the acceleration at any point on the graph. How close is it to the gravitational acceleration of Earth?
- Repeat the experiment with a dollar bill. Use the above equation to calculate how long it will take for the length of the dollar to pass through your fingers. Can you catch it?
Graphing results will show that distance traveled is in proportional to the square of the time spent falling. Your calculated acceleration should be close to 9.81 m/s2. Human reaction time is approximately 0.25 seconds which, for the majority of people, is not fast enough to catch a dollar bill.
Next project of Fun Science Projects for 8th Grade.
3.Fun Science Projects for 8th Grade
How can the processes of cloud and rain making be recreated in the kitchen?
For Making Clouds:
- Narrow necked heat resistant bottle or flask (ideally an Erlenmeyer flask)
- Stove, hot plate or microwave
- Thick oven mitt
- Ice cube
- Adult helper
For Making Rain:
- Hot plate
- Two identical chairs
- Thick book
- Metal tray (a metal ice cube tray would be perfect)
- Thick oven hot mitt
- 12 ore more ice cubes
Part 1—Making Clouds
- Boil some water on the stove or microwave.
- Let cool 30 seconds.
- Ask your grown-up to measure two tablespoons of water into your narrow mouthed bottle.
- Quickly put the ice cube at the mouth of the bottle
- Watch what happens!
Part 2—Making Rain
- Fill the heat-resistant beaker halfway with water.
- Pace the hotplate somewhere on the ground, unplugged. Place the beaker on the unplugged hot plate and fill it with three tablespoons of water.
- Set your chairs up according to the diagram below. Place a book at the edge of one chair.
- Place a metal tray so that it’s suspended between the two chairs. One edge should be elevated by the book.
- Fill the metal tray with ice. Place an empty cup underneath the lowest point of the tray to collect the condensing water (if you can use another book to tilt the tray so that its lowest point is a corner of the tray, then go for it. Place your empty cup underneath this corner instead to collect the condensing water).
- Make sure that the hotplate and beaker are under the elevated side of the tray. Plug in and turn on the hot plate.
- Place the ice cubes in the metal tray.
- Not much will happen until the water in the beaker starts to get really hot. Be patient!
- Observe, paying special attention to the bottom of the metal pan.
- Double check that the water is dribbling into your collecting cup. You might need to adjust its location.
In our first experiment, a cloud should have formed between the ice and hot water. In Making Rain, the steam boiling from the beaker should have condensed, or changed back to liquid when it makes contact with the cold metal tray. The tilt helps the newly formed water dribble into the cup.
Fun Science Projects for 8th Grade comes to an end here. Stay tuned for many such enthralling experiments.
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