See Exciting 4th Grade Science Fair Projects

Jordan
Age 9
Colorado, USA
Science Fair Project Ideas
1st Prize Winner of the Summer Science Fair Contest

Jordan presented great 4th grade science fair projects' hypotheses. Thanks Jordan for your contribution.

1. Project #1
Ideas – Biology – Life Sciences - Anatomy Science Fair Projects – Human’s Internal Clocks

Question
Do our bodies have internal clocks that tell us when it is night (time to sleep) and day (time to be awake)?

Hypothesis
I don’t believe our bodies have internal clocks that know when it is night or day.

Materials
Underground or completely dark room
20 People that would stay in the room for a month
record of sleep schedule for each person each day

2. Project #2
Topics – Biology – Life Sciences – Human Anatomy Science Fair Projects

Question
Can you get sunburn on a cloudy day?

Hypothesis
I don’t believe you can get sunburn on a cloudy day.

Materials
Color-changing UV Beads
A cloudy day
You could also test sunscreen SPFs or sunglasses or if you can get a sunburn from fluorescent light, or what time of day the sun’s UV rays are most intense.

3. Project #3
Ideas – Chemistry - Food Science – Nutrition Science Fair Projects

Question
Are prepackaged lunches (like Lunchables) less nutritious than “Mom Made” lunches?

Hypothesis
I don’t believe prepackaged meals are less nutritious than “Mom Made” lunches.

Materials
5 -10 different brands of prepackaged lunches with their ingredient breakdown
A “Mom Made” lunch.

4. Project #4
Topics – Biology – Human Psychology Science Fair Projects – Law

Question
Does an eyewitness’ testimony change over time?

Hypothesis
I believe an eyewitness’ testimony would change over time.

Materials
Make a video of a pretend crime
A list of questions about the “crime”
10 people to watch the video and answer the questions at different times

5. Project #5
Ideas – Earth Science – Trees – Forest Fires

Question
What kind of tree is the most flammable? So what kind of tree would you want to plant around your house if you live in an area with forest fires?

Hypothesis
I believe trees with thinner bark will burn faster.

Materials
10 samples of tree bark from thick and thin barked trees.
Can of sterno and a stopwatch

6. Project #6
Topics – Biology – Zoology – Ants Behavior Science Fair Projects

Question
Can ants find their way back home if they are picked up and put a certain distance from their anthill?

Hypothesis
I don’t believe ants can find their way back home if they are picked up and put more than 15’ from their anthill.

Materials
An anthill
Measuring tape

7. Project #7
Ideas – Earth Science – Weather Science Fair Projects – Meteorology

Question
How many days into the future is a weather forecast accurate (3 days, 5 days, 10 days or some sources offer a 12 day extended forecast) and which source offers the most accurate predictions?

Hypothesis
I believe that weather forecasts are most accurate for the first day and the accuracy deteriorates after that and the Internet will have the most accurate predictions.

Materials
10 different sources for weather forecasts including Internet, newspaper and local news.
A chart to keep track of the predictions and the actual weather for 3 weeks

8. Project #8
Topics – Biology – Botany – Cigarette Smoke

Question
Does cigarette smoke effect plant growth?

Hypothesis
I think plants exposed to cigarette smoke will not grow at well as plants that have clean air.

Materials
Plants
Boxes or containers to hold the plants
Cigarettes

9. Project #9
Ideas – Biology – Human Anatomy – Teeth Brushing Science Fair Projects

Question
Are your teeth cleaner if you brush them for 2 minute instead of 1 minute?

Hypothesis
I believe your teeth will be just as clean if you brush them for 1 minute.

Materials
Your teeth
Toothpaste
A swab and something to measure the bacteria found on the swab
A timer

10. Project #10
Topics – Biology – Zoology – Fish Behavior Science Fair Projects

Question
Is a fish happier in a bowl with water plants or in a bowl with just water?

Hypothesis
I believe a fish is happier in a bowl with water plants.

Materials
Two fishbowls
Two goldfish
Water plants
Water