Puzzle Day

International Puzzle Day

International Puzzle Day is celebrated on January 29, 2016. It was created in 1995 by game companies in the United States. On International Puzzle Day, puzzles of all size, shape and form will be honored. You can celebrate that day by solving one or more puzzles.

 

Have fun!

 

Homework - Photosynthesis - 10A

Read and translate

Photosynthesis is the process by which plants, some bacteria and some protistans use the energy from sunlight to produce glucose from carbon dioxide and water. This glucose can be converted into pyruvate which releases adenosine triphosphate (ATP) by cellular respiration. Oxygen is also formed.
Photosynthesis may be summarised by the word equation:

carbon dioxide + water

glucose + oxygen

The conversion of usable sunlight energy into chemical energy is associated with the action of the green pigment chlorophyll.
Chlorophyll is a complex molecule. Several modifications of chlorophyll occur among plants and other photosynthetic organisms. All photosynthetic organisms have chlorophyll a. Accessory pigments absorb energy that chlorophyll a does not absorb. Accessory pigments include chlorophyll b (also c, d, and e in algae and protistans), xanthophylls, and carotenoids (such as beta-carotene). Chlorophyll a absorbs its energy from the violet-blue and reddish orange-red wavelengths, and little from the intermediate (green-yellow-orange) wavelengths.

Chlorophyll - click on image to open
All chlorophylls have:

• a lipid-soluble hydrocarbon tail (C₂₀H₃₉ -)
• a flat hydrophilic head with a magnesium ion at its centre; different chlorophylls have different side-groups on the head

The tail and head are linked by an ester bond.

Homework_ Respiration - 9A

Read and translate.
RESPIRATION

How breathing works

During breathing, air moves from areas of high pressure to areas of low pressure. When the pressure in the lungs is lower than the pressure in the atmosphere, air enters the airways. If the pressure in the lungs increases, air moves out of the lungs and is then exhaled.

Inhaling

The diaphragm and intercostal muscles between the ribs contract. As a result, the ribcage expands, creating a decrease in pressure, and air is drawn into the lungs.

Exhaling

After breathing in, the diaphragm and intercostal muscles relax and the ribcage contracts. Pressure inside the lungs increases and air moves out of the lungs in order to be exhaled.

Homework - Biology - 7Б

 Read and translate.

Mammals

Mammals are one of the 6 main classes of animals.

There are only about 4,000 kinds of mammals.

Mammals are warm blooded.

The temperature could be freezing cold or boiling hot, but mammals’ bodies maintain about the same temperature all the time. Warm blood lets the mammals be very active and live in a wide variety of places.

Mammals are everywhere.  Polar bears live in very cold areas.  Camels live in hot areas.  Moles live under the ground.  Bats live in caves and fly in the air.  Dolphins live in the oceans.  Fur and fat help protect mammals who live in the cold.  Mammals sweat to release extra heat if they live somewhere hot.

All mammals have fur or hair.

Sometimes it's long hair covers their entire body

Sometimes it's very short hair.

Even mammals that swim under the water (like dolphins and whales) have hair.

Mammal Babies:  We all drink Milk!

All baby mammals drink milk that comes from their mothers' bodies.  Because the babies rely on their mother's milk to live, the mammal mommies have to care for their young.  The length of time varies from a few weeks for mice to many years for humans!

Mammal mothers are hard workers.  Baby mammals learn from their mothers.  The babies watch their mother and do the things they see her do.  Through copying their mothers, baby mammals learn everything they need to survive.

So, what do mammals eat when they grow up?  They eat all sorts of different things!  Lions are mammals who eat meat – they are called carnivores.  Cows are mammals who eat plants – they are called herbivores.  People are mammals who eat meat and plants – they are called omnivores.

Mammals are vertebrates, which means that they all have backbones (spines).

So, all mammals:

·        are vertebrates (which means they have a backbone or spine).

·        are endothermic. Also known as “warm-blooded,” endothermic animals regulate their own body temperate which allows them to live in almost every climate on Earth.

·        have hair on their bodies.

·        produce milk to feed their babies. This allows them to spend more time with their young and teach them important skills they need to survive on their own.

Homework - 4 классы

Задание выполняется в тетрадях. Пишете номер задания, номер предложения и то слово или предложение, которое требуется в задания. Внимательно читайте задания и обращайте внимание на образец.
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