2) Answer these questions
What is nutrition?
Allows us to get some of the substances, we need to live. We get these substances from our food.What systems are involved in nutritionThe digestive system is involved in nutrition.
What is behavior ?Is how we act and we respond to the world around us. Behavior makes it possible for us to relate to others.
What systems are involved in behavior?The skeletal-muscular system and the nervous system are involved in behavior.
3)Explain the difference between sedentary and nomadic ways of life.
Sedentary: this mears they always lived in the same placeNomadic: did not live in a specific placeWhat are the advantages and disadvantages of each way?Nomadic: know different places.Sedentary: make their houses in a specific place.Why were our first ancestors nomadic?Because when the food fished in one place they must move to other place to find food.Why did they change their way of life?Because they learn cultivate how to cultivate and how to grow animals.
4)How did our ancestors live?
They lived on the earth four millions years ago.They hunt for eatingThey live in hutsThey used the meat, the skin and the bonesWhat tools did they use?Harpoons made of boneAwl made a boneHand mill made of stoneSizes shaped on two sidesHow did they make these tools?They made instruments with sharp edges to out skins and they made spearheads to hunt an animals later they made more complicated tools, like harpoons using animals bones.Later still. They made tools and weapons by sticks and stones
jueves, 19 de marzo de 2009