问题 问答题

在探究物体所受重力大小与物体质量的关系时,实验记录如下表.

次数物体质量/kg物体重力/N重力与质量的比值/(N/kg)
10.10.989.8
20.21.969.8
30.32.949.8
(1)在实验过程中,需要的测量工具是______和______;

(2)分析表中的实验数据,得出的结论是______.

答案

:(1)实验中需要测量的物理量是:质量与重力,所以测量工具为:天平和弹簧测力计;

(2)分析表中数据,物体所受的重力随质量的增加而增大,且比值是常数,说明:物体所受的重力跟它的质量成正比.

故答案为:(1)天平、弹簧测力计;

(2)物体所受的重力与它的质量成正比(或物体所受重力与其质量的比值是一定值).

多项选择题 案例分析题
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Festivals play an important role in a culture’s identity. I can’t think of a better way of appreciating a new culture than by taking part in one of its festivals. Here are some special festivals around the world.

★Boryeong Mud Festival--Boryeong, South Korea

For two weeks in July, millions gather in Boryeong to experience the grey pools and slides. What began as a way of promoting the region’s mineral-rich mud has turned into a festive party , complete with music and fireworks. While the mud is usually only available in cosmetic products, here you can cake yourself in grey as you want.

★Holi--lndia

Holi, the Festival of Colors, is a Hindu celebration full of joy and one of India’s most important holidays. During the day of the last full moon of the lunar month, usually late February or early March, the air is full of bright colored powder. The festival is celebrated differently throughout the country, but the cheerful spirit is common throughout Hindu communities around the world.

★Koninginnedag--The Netherlands

Although their current Queen’s birthday is really during the winter, the Queen still celebrates it on April 30th,the country’s official “Queen’s Day” since 1949. Orange is the national color, and the streets become a sea of feather boas(长围巾)and body paint as crowds gather in the plazas(广场). Amsterdam is the center of this outdoor party, with many live music acts, but nearly every town is alive with orange on this day.

★National Elephant Day in Thailand

In Thailand, March 13 is regarded as National Elephant Day to show that the Thai elephant plays an important role in the Thai history. Thai Elephant Day has been held on an annual basis since the idea was first approved by the Thai government in 1998. Special events are held at a number of venues in northern Thailand. At the Mae Sa Elephant Camp, it has become a tradition on March 13 for the dozens of elephants there to be treated to a huge feast of fruits and sugarcane.

小题1:What we can learn from the passage is that ________.

A.Boryeong Mud Festival was originally held to advertise for their mineral resources

B.people around the world celebrate Holi differently to promote their religions

C.Koninginnedag--The Netherlands was celebrated on their current Queen’s birthday

D.it is an international custom for the Thai elephant to eat all kinds of fruits and sugarcane小题2:What is the purpose of the festival held on March 13 in Thailand?

A.To call on people to protect these endangered elephants.

B.To give the Thai elephant a chance to eat fruits and sugarcane.

C.To stress the importance of the elephant in the Thai history.

D.To help people relax themselves by feeding the Thai elephant.小题3:You can experience the Festival of Colors in _______.

A.South Korea

B.Thailand

C.the Netherlands

D.India小题4:What is the main purpose of the text?

A.To tell people how to enjoy and relax themselves.

B.To introduce some unique festivals around the world.

C.To get people to celebrate different kinds of customs.

D.To show the importance of celebrating different festivals.