Use Ratios to Help with Our Spaceport Census!

“Blasters, we walked into the Larva Den this morning and discovered a bunch of brand-new Larva pals that we had never seen before. As part of our annual Census, we like to keep track of just how many different kinds of larva we have on the ship at any given moment. With this information, we can use ratios to learn interesting facts about our space friends. So just what are ratios? Ratios are statements that tell us how sets of numbers compare. So if we had 3 green larvae and 9 pink larvae, which would give us a ratio of 3:9 larvae, or 1:3 if, we simplify it. That would mean for every green larva aboard our ship, we would have approximately 3 pink larvae!

LarvaRatios

Now we can put this handy knowledge into use as we conduct our annual Larva Spaceport Census! Using our high-resolution image of the Spaceport’s larva population, count the total number of our little friends. Then, let us break that number down by color. Can you tell us how many we have of each color?

With our scientific data of the ship’s larva population, we can create our very first ratio! Let’s start by making a ratio comparing all of the different colors! Once you have mastered that, make smaller ratios that compare each color with a different color.

Ratios not only help us compare numbers, but they can allow us to better predict outcomes in the future! Say that we returned back to the Larva Den tomorrow morning and discovered that the amount of green larvae had doubled! Using the power of ratios, we can find out approximately how many yellow larvae we might be able to expect to see in the Larva Den as well! To do this, multiply the number of pink larvae by 2.

Were you able to predict how many pink larvae there would be? Use this knowledge of rations to let us know the answer in the comments!

Speeding Through Galaxy Grand Prix

Our Blaster friend Sara CyberSatellite is practicing today for a BIG race this upcoming weekend. To help make sure she is ready to excel tomorrow, Sara needs to time herself and see how long it will take her to complete the race. Normally, Sara only races one lap when she goes on the Shooting Star Strip. For this huge Racer rally, however, she will have to go for a solid THREE laps!

Sara’s target time for this race is to reach the finish line in under 3:30. To see if she needs to practice looping through the course, let’s help Sara predict her estimated finish time tomorrow using speed, distance, and time.

The first thing we need to do is calculate how long it takes Sara to complete one lap of the Shooting Star Strip. Are you ready to start your timers? Ready… Set… Go!
mbgalaxySara sure is one speedy driver! She finished the course in a time of 1:20. First, let us convert her time to seconds so that it will be much easier for us to use. Since a minute is 60 seconds long, that means she came in at a total of 80 seconds.

Now we can calculate her rate! This is actually very easy. Think of rates as a type of ratio, where we have distance on the left side and time on the right side. This gives Sara a rate of 1 loop per every 80 seconds (or 1:80).

Next, let us find out her predicted time! To do this, we multiply both sides of the fraction by 3, which gives us 3 loops per every 240 seconds.

Now it is time for us to convert our 240 seconds into minutes, which we can do by using our long division skills. Take 240 and divide it by 60 to get our final answer.

So did Sara beat her target time of 3 minutes and 30 seconds? Comment below with the answer and tell us what her predicted time is!

Worksheet of the Week: Picture the Ratios

picture-the-ratiosRatios are ways to compare different sets of things. For example, if we wanted to see how many chickens we had on our farm to how many cows we had, ratios help us see this in a clear and simple way. Use our free Worksheet of the Week to practice all of the different ways we can write a ratio, and help up compare the different sets of items in each picture! If you need some help, do not be afraid to ask an adult! budurl.me/MBWorksheet120

Worksheet of the Week

Fractions to Ratios - Ratio Worksheet for Kids

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