St. Elizabeth Ann Seton - Wichita, KS

DSWO WEEK 5 2016

 

DSWO Week 5 2018

 

9-17    Life - Nutrition - cause/effect

 

What's the best food to eat before a test or an exam?

 

 

9-18     Life - Disease - cause/effect

 

Why do you think some elderly people experience loss of memory?

 

 

9-19     Physical - Meteorology - cause/effect

 

How does a rainbow form?

 

9-20     Life – Biology – observing

 

As humans age, their faces get wrinkled, and their hair thins or turns gray.  How does an animal’s appearance change as it gets older?

 

 

ANSWERS:

 

9-17     The night before a big test, have a bedtime snack that's high in carbohydrates, such as a muffin or toast and milk.  Carbohydrates will help you get a good night's rest.  A high-protein breakfast on the morning of the test will help keep you clear-headed so that you'll be able to remember what you studied.

 

 

9-18     Many people in their 70's and 80's suffer from Alzheimer's disease, which causes severe confusion and loss of memory.  This disease is linked to age:  5% of people over the 65 have the disease, and 50% of those over 85 have it.  No one knows yet what causes the disease, but it makes brain cells die causing the brain to shrink.  It also tangles up neurons, cells in the brain that conduct electrochemical impulses.

 

9-19     A rainbow is created when drops of moisture in the air separate sunlight into colors.  The drops of moisture act like prisms, splitting the light into a spectrum of colors - red, orange, yellow, green, blue, violet.  The light is refracted, or bent, by the water drops.  The amount of refraction for each color is always the same, so the colors always appear in the same order.  Red always refracts the most light, and violet always refracts the least.  Although a rainbow may appear to exist at a specific point in space, it does not.  If you could reach the end, middle, or top of the rainbow, you would find only white light , air and moisture.

 

 

9-20     Some animals, such as whales, elephants, crocodiles, and fish, grow throughout their lives.  These animals show their age by their increased size.  Male deer, elk, and moose grow bigger antlers as they age.  When they are very old, their antlers start to shrink.  Some types of fish and reptiles have growth rings on their scales, just as trees have rings.

 

DSWO WEEK 4 2018

 

DSWO WEEK 4

 

9-10  Earth – Geology – cause and effect

Why are spectacular canyons found in the western United States but not in other areas of the country? 

 

9-11  Physical – Physics – classifying

How are a nutcracker, a seesaw, and a rake alike?

 

9-12  Earth - Environment - calculating

Estimate how much water you use each day.  (Remember that farmers use water to raise the plants and animals that supply your food.) 

 

9-13  Physicals – Chemistry – draw a conclusion

How does salt, such as table salt, keep wet roads from freezing in cold weather?

 

Answers:

 

9-10  Canyons are created when a powerful river travels through very dry land.  In parts of the world where there is abundant rainfall, runoff from the land’s surface gives most rivers gradual, sloping banks.  In the Rocky Mts., however, abundant rain and snow create fast-moving rivers through very dry land.  Very little water runs into the rivers from the surface of the land.  As the river cuts through the rocks it leaves steep, vertical walls.

 

9-11  All of them are levers.  A lever is a bar that turns about a fixed point, a fulcrum, giving its user more power to lift, squeeze, or push something.  A lever is a machine, and a machine is anything that can make work easier and faster.  The simplest machines are levers, screws, inclined planes, wheels and axles, pulleys and wedges.

 

9-12  Each American uses an average of 2,000 gallons of water per day.  You use water for showers or baths, brushing your teeth, drinking, and cooking.  You also use water in less obvious ways.  For example, it takes about 75 gallons of water to make one egg, and 150 gallons of water to make a loaf of bread.  A pound of beef "costs" 2,500 gallons of water; cattle not only drink water but also consume plants, which require water.  Water is also used to create power.  Manufacturers use about 100,000 gallons of water to make a new car. 

 

9-13  Water molecules normally form ice a 0 degrees Celsius (32 degrees Fahrenheit).  When table salt (sodium chloride, NaCl) dissolves in water, it separates into 2 charged particles, and the molecules of water join more strongly to the separate sodium and chlorine particles than to each other.  Therefore, the water molecules do not join together to form ice.