Posts Tagged ‘science’

LEGO Chemistry

Monday, March 2nd, 2015

LEGO-Chemistry

My son illustrated how water dissolves salt in a solution, performing LEGO chemistry! He started with a square green base. He placed yellow and orange LEGOs on the bottom, representing Na and Cl. The Na (sodium ion) is positively charged, and the Cl (chloride ion) is negatively charged.

When placed in water, the water has a polar covalent bond, meaning that the water molecules are slightly charged. This is because the Oxygen pulls harder on the shared Hydrogen electrons, making the Oxygen side negatively charged. The two smaller Hydrogens are slightly positively charged because their electrons are being hogged by the Oxygen most of the time.

NaCl-H2O

When the table salt (NaCl) is placed into water (H20), the positively-charged Sodium atom is attracted to the negatively-charged Oxygen atom, pulling the Sodium away from the Chloride. In the same way, the negatively-charged Chloride ion is attracted to the positive end of the water molecule (the two Hydrogen atoms).

The water is dissolving the salt by breaking the Na apart from the Cl in this way. The small blue LEGOs are Oxygen atoms, and the red LEGOs are Hydrogen atoms. (In reality, he should have used tiny single LEGOs for the Hydrogen atoms, because they are way smaller than Oxygen atoms are!)

lego-chemistry-2

And there you have it: LEGO Chemistry! If you did not understand my explanation, perhaps this video will help to clear things up:

How Water Dissolves Salt

Why not join the Unit Study Treasure Vault and watch the 24 high school chemistry experiments we’ve performed so far!

How to Make Homeschool Science Come Alive

Friday, December 12th, 2014

how-to-make-homeschool-science-come-aliveAre you wondering how to make homeschool science come alive? Well, you’ve come to the right place! Today you will hear a panel of homeschool parents discussing how to make science one of the most exciting subjects for your homeschool!

The reason hands-on activities are more important for science than for any other topic is that you can’t truly understand the science concepts without seeing them in action. This is why experiments are so important and why you really ought to touch what you are studying.

Why You Shouldn’t Feel Intimidated by Science

You don’t have to know anything scientific before teaching science. Since the material you are teaching is meant for a child, you can easily learn it along with your kids. If you have a delight in your eyes while you are teaching it, that delight will spark interest in your children.

Everyone makes mistakes while doing science, so don’t be afraid to fail. When making the Edible Sedimentary Rock, you will notice in the video that I poured the liquid into the pan quickly instead of slowly, and the layer was lumpy instead of smooth. My daughter screamed from being splashed accidentally with the hot liquid, which I had no idea would pop out of the pan at all. So you see, even my polished experiments contain mistakes and failures, and you can just laugh and move on.

It helps to see a video demonstration of the concepts being taught. If you are studying Earth and Space or Chemistry, feel free to watch these video demonstrations:

What Materials Do You Need for Homeschool Science?

For elementary science, you don’t need to buy very much that isn’t already in your house–vinegar, a drinking glass, a funnel, those kinds of things. Once you get to high school science, you will want to get some equipment like a microscope, a scale, beakers, etc, depending on what you are studying. You really need to do the high school experiments in the lab sciences to fully understand those concepts, so you don’t want to scrimp at that point.

Science Field Trips

When you are studying outer space, you can do star gazing, go to an observatory, or visit a space center. When studying birds, you can go bird watching, visit a bird sanctuary, or go to a chicken farm. A weather station is a perfect field trip if you are studying the weather. Just go to a place that brings your science topic to life, and you can experience that topic in a fresh way.

What About Preschool Science?

Preschool science is all about delight and exploration. We have done nature collections, put together various terrariums, played with bubbles, and explored many other science topics. Here is a fun article about preschool science: Science in Early Childhood.

Chemistry Coloring Book

Wednesday, November 26th, 2014

chemistry-coloring-book

I received copies of this book for free and was compensated for an honest review. This post may contain affiliate links.

If you’ve been following my blog, you’ve noticed all the cool chemistry experiments we’ve been doing. I have been teaching my younger two kids elementary-level chemistry and my older two kids high school chemistry. I had all four of my kids color one element per day in The Periodic Table of Elements Coloring Book, and we learned a lot about each element!

This chemistry coloring book has one element per page: one side lists bullet points to help us find out about that element, and the other side is a coloring page about that element. By coloring the pictures, you cement in your mind visually what each element is all about. Even though I aced my high school chemistry class years ago, I never learned all the elements so up-close like this!

Here is a video where I explain how I used the book:

I read the bulleted list for one element each day, and it took less than five minutes. While I read the page, the kids colored the coloring page. We located each element on the Periodic Table at the front of the book, and we became familiar with each element as the days went by.

The day we studied Neon, we were driving around in the car, and my 9-year-old daughter pointed to a Neon sign and shouted, “Neon! Atomic number 10! Let’s find more Neon signs, Mom!” She would never have known that Neon was atomic number 10 if we hadn’t studied it that day. The coloring book caused my elementary-aged daughter to become familiar with elements, and she wanted to play games trying to find those elements. She screamed with joy when she recognized the first Neon sign after having colored it in her book earlier that day.

neon-sign

For my high school-level students, you never really get the chance to become familiar with elements like this during a chemistry course. Because my high school students had done one simple coloring page a day, they internalized the lighter and heavier elements in their minds. For example, Hydrogen is atomic #1, and it is the lightest element. When  we were halfway through the coloring book, we knew that the elements that we were familiar with were the lighter elements. The unfamiliar elements were on the bottom half of the chart.  Each number goes up in atomic mass (or weight), so when my high school-level students were trying to find an element on the Periodic Table, they located the elements a lot more quickly because of their familiarity with each element. Like I said, we located one element on the chart per day as we colored the elements.

helium-balloons

There is plenty of time during a school year to take it one element per day rather than just rushing through them. We also tried to locate those elements in real life each day when we could. For example, Sodium is present in table salt, so you can have a salt shaker in front of you as you read the Sodium page. We found some more elements in our rocks and minerals collection.  When you study Helium, why not go to a party store and buy a Helium balloon to celebrate that element, which is obviously lighter than air!

elements-minerals

There are no drawbacks from this chemistry coloring book aside from a few typos which are common in all books and don’t detract from the great content. Also, the book only covers the first 56 elements, and elements 72-86, which are the most common elements. I’m fine with that. We LOVED the book, and I highly recommend it for all the reasons I’ve mentioned.

After going through The Periodic Table of Elements Coloring Book, whenever we watch a show that mentions any element on the Periodic Table, we know what the show is talking about. Because we are more knowledgeable about the elements, my kids are confident in their study of chemistry.

Elementary Chemistry Series

Monday, November 24th, 2014

elementary-chemistry

This post contains affiliate links. I was compensated for my work in writing this post.

Can you teach elementary-level kids something as difficult as chemistry? Yes, you can! This year we studied elementary chemistry, and the curriculum we used was Christian Kids Explore Chemistry by Bright Ideas Press. We had a wonderful time doing all the experiments, which helped us to understand basic chemistry concepts.

The book presented these chemistry concepts in a way that even a child could understand. The science experiments used inexpensive household items, and the experiments were not difficult to perform. My high school kids were present when I went through this elementary-level chemistry book with my two younger kids, and my older kids did better in their high school chemistry because the basic concepts had already been mastered, so the more difficult high school-level concepts were easier to understand.

The multiple choice tests for each chapter were hilarious. One of the answers always made my kids laugh hysterically. You still needed to pay attention and learn all the lessons because it was not possible to pick between the other two possibilities unless you knew the material. In this way, my kids began to look forward to the chemistry tests! Can you believe it? That’s definitely a positive aspect of using this curriculum!

In case you missed any of the experiments that we performed, here is an index of the fun chemistry experiments:

1. Chemistry Tools
2. Filtration Experiment
3. Make Your Own Element Cards
4. Mixtures and Compounds
5. How to Build Atomic Models
6. Atomic Cookies
7. Building Molecular Models
8. Breaking Covalent Bonds
9. Acids and Bases
10. Dissolving Calcium with Acid
11. Measuring the Volume of a Solid
12. Testing Charles’s Gas Law
13. Saltwater Experiment
14. Saturated Solutions
15. Freezing Alcohol
16. Hydrocarbons

I hope you enjoyed all these experiments as much as we did!